charge power tool batteries in car manufacturer

I am always trying to reduce the number of tools I carry into a house. I am thinking about leaving my battery chargers in my van hooked up to a power inverter. Will this drain my battery in my van? If not, what size inverter would it take to run 3 or 4 battery chargers?

That will suck your batteries dry faster than you can say Linda Lovelace. You would have to keep the van running, and at $3.35 a gallon, I"m not idling to charge cordless; if you want a motor running, add a gas powered generator. Just run an extension cord to a power strip in the van. I wouldn"t mess with an inverter.

If you have the right setup you won�t suck your battery dry. However, most inverters put out a modified square wave instead of a true sine wave. This will damage most batteries because of the way the chargers work. Most modern chargers are transformer-less and they rely on the sine-wave being true. If you hook up a charger to an inverter that has a modified square-wave output, your tools� battery life will be shortened considerably. I have a Vector 3000 watt inverter that I use to power most if not all of my tools. I have a separate deep cycle battery to operate it from. I have a boat battery switch to keep it isolated, or in parallel with my car battery or to operate the inverter from just the car battery/alternator. This way I have a choice from which source my battery drain will come from. With the one deep cycle battery and normal tool usage I can average about an 8 hour day before the battery starts to show itself weakened. This does not include my tablesaw or my 1HP compressor, which draw a lot of current. If I run low on battery power at the end of the day I can run the car battery and the inverter battery in parallel to extend the use. I can also run the engine and operate off of the alternator. But this uses expensive fuel and I try to avoid it.

Car chargers have plugs that go into your vehicle’s power socket (i.e. the cigarette lighter socket). Unfortunately, that means you can only plug them into your car and not into a regular socket.

The keyword here is ‘directly’. For example, some people use adapters that split their car’s only electrical socket into two or three additional ones to power multiple devices simultaneously.

Sure, that might seem convenient, but it’s going to prevent you from charging your drill battery effectively. That’s because your charger would be struggling with the other devices to get the power supply it needs.

So, when charging drill batteries in your car, make sure the charger is plugged in directly (i.e. not through an adapter) so that it gets all the power it needs.

The power socket still functions in most cars even when the engine is turned off. That means the socket will draw power directly from the car’s battery that’s under the hood.

Still, it’s never a good idea to drain power from your car battery while the engine is off. When you do that, you run the risk of the battery going dead when you need it to start your car engine again.

So, if you’re going to charge your drill battery using a car charger, you should at least start the engine. However, you don’t necessarily have to drive the car because the running engine is enough to power the alternator, which keeps your car battery charged.

Drains your car battery: When you plug a car charger into your car’s power socket, you’re draining energy from the car battery. Ideally, you should keep your engine running to avoid the risk of killing your battery. Plus, your charger places an extra burden on your car’s electrical system, even if only a small one.

Charges one at a time: Some power users are likely to have more than one battery they need to use for their day-to-day tasks. When you rely on a car charger, you can only charge one battery at a time. That can be a challenge for anyone needing to charge several drill batteries at once.

Cordless power tools make life much easier for the DIY-ers and professional tradespeople alike. They carry the same power as their corded counterparts without the hassles of extension cords and generators. Who doesn’t love grabbing their cordless drill and heading to the backyard to finish installing deck boards without having to stretch a long extension cord across the yard?

Cordless power tools come with batteries that are the powerhouse behind getting your jobs done. They may seem a little tricky and bring their own questions. With the right answers, you can not only keep that to-do list short, you will have a piece of equipment ready for any task for years to come. Here are twelve common questions about power tool batteries.

Brand new batteries should be charged overnight to ensure you have a full charge on each individual cell, so that the life of the cell is not compromised. From that point on, future charges on a the proper/adequate charger can take between 30min to 2 hours to achieve a full charge. Never use under-powered chargers for high capacity batteries. Newer chargers are designed so that you cannot overcharge your battery (though don’t store it here, plugged in), and lithium-ion batteries have little to no memory, so you don’t have to worry about emptying it before charging.

When in doubt, check out Ottawa Faster Supply. We have a wide selection of tool batteries and cordless drills, saws, and tools to meet your DIY needs.

Battery-powered tools are great for tackling jobs where corded options simply won’t cut it. Cordless tools shine when you’re away from home and don’t have access to electricity, fore example, when you’re building a cabin, shed or porch, or working on a car at a race track or on an off-road trail. However, it’s important to keep your battery-powered tools topped off at all times. Here are some tips to ensure you don’t end up in a bind.

When purchasing battery-powered tools, you may have been advised to stick with a single manufacturer if you’re considering expanding your collection. There’s a simple reason for this: One company’s battery pack often works across multiple devices, which means when you buy additional batteries to take with you, you can use them in more than one tool. Having extra batteries on hand — already charged — is a great way to be prepared for pulling extra duty.

Most modern battery chargers will trickle power into a pack to keep it topped up without the danger of overcharging it. This means you should leave your batteries charging at all times because the alternative is a dead battery that may start to lose capacity if it leaks down to zero too many times. Many tool companies recommend charging a battery once it hits the 70 percent point, in terms of discharge, and not to stop a charge midway through — let it hit 100 percent before unplugging.

Extreme conditions don’t do your battery-powered tools any favors and that means things like dust and extreme temperatures are enemies of proper operation. The last two are particularly relevant when discussing battery packs, as they can become damaged if they overheat or lose their charging capacity when constantly exposed to the cold. Don’t leave batteries sitting in the trunk or back seat of your vehicle. It’s always better to store them somewhere safe, like your temperature-controlled workshop.

Check out all the tools & equipment available on NAPA Online or trust one of our 17,000 NAPA AutoCare locations for routine maintenance and repairs.For more information on the battery-powered tools, chat with a knowledgeable expert at yourlocal NAPA AUTO PARTS store.

Solar-powered charging stations for building sites are long overdue. One reason they"re not dotting the shelves of your local box store is that tools have different batteries and are typically set up with their own power adaptors to go from A/C to the onboard DC battery in the tool. And as you"re about to learn, from engineer Jeff Yago, " powering 120-volt AC power tools requires a 1,500 to 3,000-watt inverter and very heavy battery bank." In other words, it"s just not practical. What is practical? You"re about to find out, in this great article, reprintede with permisssion from Backwoods Home Magazine.—Editor

If you are planning to live off grid, or are building something in a remote area without grid power, I am sure you are planning to use a generator. While I have also owned generators, I find them temperamental, noisy, and I hate to drag fuel up some mountain trail when I need to power construction tools. To wean myself off the traditional construction site generator, I found an amazing selection of high-quality power tools that operate on battery packs. In addition, if you standardize on the same brand and voltage, the same battery packs will be interchangeable with a wide array of power saws, drills, portable lights, and even radios. Keeping a spare battery pack on charge also allows a quick battery change and continued tool operation without having to wait.

When I first started buying battery-powered tools, I decided to standardize on DeWALT, but there are several other good brands of battery tools that offer the same interchangeability of battery packs in multiple tools. It is amazing what you can build with just a few battery-powered tools, and a complete set is indispensable if you live off-grid or are building a remote retreat.

Most manufacturers of commercial-grade battery-powered tools with Nickel-Cadmium (NiCad) battery packs have increased their voltage from 12 volts up to 18 volts to increase tool power and extend operating time. Some battery-powered tool manufactures are switching to Lithium-ion (Li-ion) batteries which allow making smaller and lighter portable tools due to the higher energy density of this new battery technology. Although the DeWALT charger I used for this article can charge both NiCad, NiMH, and the newer Li-ion battery technology, you still should standardize on one type to make sure all of your battery packs can use the same charger.

For large solar power projects, I am a firm believer in using high-quality DC to AC inverters which allow using standard 120-volt AC appliances and power tools. Inverters are becoming much more reliable and less expensive, which allows using your existing house wiring instead of having to rewire everything for DC. However, powering 120-volt AC power tools requires a 1,500 to 3,000-watt inverter and very heavy battery bank. Some small inverters costing less than $50 are now available to power your laptop computers and video devices while in your car or truck.

Unfortunately, many of these lower cost inverters do not generate the same waveform as the utility grid, which can cause problems with the more sensitive electronic devices you want to power. It is also true that many battery chargers for recharging power tools will have very poor charging performance when connected to a low-cost modified-wave 120-volt AC inverter. Most of these low-cost inverters also have a low power conversion efficiency, and can quickly drain your car or truck battery if the engine is off while powering any 120-volt AC device.

I was pleasantly surprised, however, to find that most manufacturers of battery-powered construction tools now offer a version of their power tool battery chargers in a 12-volt DC portable model, typically called a “vehicle charger.” Although harder to find and a little pricey at $65 to $95, these DC-to-DC chargers provide the ability to recharge your 12 to 24-volt battery-powered tools from a 12-volt battery without inverter or generator. Here are some examples from Bosch and DeWalt.

There are many advantages to using portable 12-volt power without the need for an AC inverter. Not only will this make all wiring easier and safer than dealing with 120 volts AC, but powering 12-volt DC devices directly from a 12-volt battery is much more efficient.

This can be a real advantage if your construction project or weekend retreat is located in an area where hauling generator fuel and equipment up a mountain trail is a major effort. Although this project was intended primarily for powering tools at a remote job site, you can also use this portable solar-power system during a power outage or when camping to recharge your cell phone or power a laptop computer, since most of these devices include charging adapters to fit a 12-volt DC vehicle auxiliary outlet.

I designed this project to require a minimum number of parts and very few wiring connections. I selected a standard Group 31 RV/Marine battery which is designed for multiple deep charge/discharge cycles while still being reasonably priced. I also found an inexpensive plastic battery box, 10 ampin-line DC fuse, and female cigarette lighter receptacle(Here"s one with battery terminal attachments and fuse built in). I decided to use this type of power receptacle for this project since so many portable tools and electronic devices have charging adapters that fit this type of 12-volt DC receptacle. As shown in the photo, I mounted the cigarette lighter receptacle in the box cover and wired it through the fuse to the battery using #10 standard copper wire and crimp on ring terminals. The center post of the cigarette lighter receptacle is always connected the battery positive (+) and the outer shell is always connected to the battery negative (-).

A typical 85-watt solar module designed to charge 12-volt batteries will typically have a peak output of 5.1 amps, so I selected an 85-watt module. This smaller wattage module is also fairly easy for one person to carry, while still large enough to provide a reasonable amount of solar power. Your solar module can be larger or smaller than my 85-watt module selection, which will reduce or increase the number of days it takes to fully recharge the RV/Marine battery.

It feels really rewarding to build something off-grid in a remote area with the convenience of labor-saving power tools without having to deal with a noisy generator. It’s also nice to have a portable solar-charging system instead of having to keep your truck running while using a DC to AC inverter to power your tools and tool chargers. When not needed to recharge power tools at a job site, this portable solar-charging system can be used for camping or during emergency power outages. This solar module with built-in solar charge controller can even be used to recharge your RV camper batteries when dry camping.

While most major manufacturers of battery-powered hand tools offer an “in-vehicle” charger, these are not easy to find in your local retail store. If you cannot find them locally, there are several Internet sites that sell in-vehicle chargers. Order the charger that matches your brand of battery-powered tools, and be sure the charger matches the voltage and chemistry of your battery packs.

We’ve all come to rely on the convenience of cordless power tools. However, a cordless tool is only as reliable as its rechargeable battery. Once the battery can no longer hold a charge, it’s dead and useless. Or is it? What you may not realize is that a “dead” battery is often only partially dead, which means you might be able to resuscitate it.

For this first method you’ll need one fully charged battery, which you’ll use to jumpstart the dead battery. Set the two batteries side by side. Then, take two short insulated wires and connect them in matching polarity between the two batteries: positive to positive, and negative to negative. What you’re essentially doing is transferring power from the live battery to the dead one. Wait about five minutes or so, then disconnect the wires and place the dead battery into the tool’s battery charger. If the battery starts receiving a charge, then the jumpstart worked. Leave the battery in the charger for an hour or until it’s fully charged. This YouTube video gives a good play-by-play on how to attempt this method.

We know it’s tempting to grab a third-party replacement battery online. We hear stories from people who let us know they’re just as good as the original at a much lower cost. But are they really? We’re teaming up with Power Tool Institute (PTI) and its Take Charge of Your Battery campaign to take a look at why you should always use original manufacturer power tool batteries and chargers.

Today’s cordless power tools are much more complex than what we used 10 or 15 years ago. Most have built-in electronics that let the battery and tool talk to one another in real-time. There are also additional electronic communications that happen between the battery and the charger.

While communication plays a huge role in why you use original manufacturer power tools batteries, there are other elements. Not all lithium-ion cells are created equal. Original batteries from Power Tool Institute member manufacturers use cells with proven designs, strict quality control, and longer lasting capacity.

When tool manufacturers design a battery-operated product system, both cell and component selection have an effect on a system’s ability to efficiently deliver energy. Advancements in motor design and cell size allow increased power levels not possible in many older designs. When you use a cheaper knock-off battery, you run the risk that the battery may not be compatible with the energy demands of the system, which can lead to damage to the battery, tool or charger.

Even though there are videos and stories out there of people successfully using knock-off power tools batteries, they don’t tell the whole story. Whether you’re talking about a tool failure, a failure that leads to property damage, physical injury, or just shorter battery life and capacity, the money you save buying a cheaper battery may result in a much more expensive experience over time.

I would rather have my good tools , that my husband has bought me through the years.. than a diamond ring. WHAT GOOD ARE THEY> ha…(One of a kind but feminine..)Glad you enjoyed this article, Cheryl!

does a new lithium battery come with absulutely no power? Mine has and will not take a charge.Hi, Anthony,

No, a NEW lithium ion battery should not come with NO power, in a state where it will not take a charge. Lithium batteries that have been OVERLY discharged, usually while under a heavy current load will trip the battery’s protection circuit or if left discharged for an extended period, it creates a situation where the chemistry of the battery has changed due to inactivety. The battery can most likely be revived. However, lithium batteries will explode if not properly “brought back to life” or even charged incorrectly. Don’t mess with it. Return the battery for a replacement.Exactly, Artorius. Awakening a sleeping ‘li-on’ is possible (see more information here: https://batteryuniversity.com/learn/article/low_voltage_cut_off) but most customers would probably feel more comfortable returning the battery for a replacement.

I have an older Makita drill model 6095D which uses the 9.6 volt Ni-CD battery. It has worked great for many years. However, just recently the charger on all three batteries I have will not charge fully. I have traced it to the charger reaching a thermal limit and turning off because if I put the charger in the refrigerator while charging it will go to the end of the charge time and also in the winter ( I store the tools in the garage) the charger will charge much better. Have you seen this to be a problem?Hi, John,

I have several of the Ryobi cordless tools now. I cannot find any specific info on what temperature range (coldest) they can be stored at. I live in a cold climate and would like to store them in an outdoor building instead of in the house.Hi, Carolyn,

When asked which power tool brand someone should go with, most pros and experienced DIYers will drive home the importance of battery power, battery life, and availability before they mention special features, speeds, or durability. That’s because, without reliable batteries, the tool extras don’t matter. But beyond not being able to use a cordless tool without a dependable battery, many batteries are expensive and can cost as much as the tool in many cases.

With the battery being so crucial, did you know that you might be prematurely killing your power tool batteries? This guide will show you how it may happen, and point out some ways to help make your batteries last as long as possible.

If they’re not paying attention, it’s very easy for a DIYer to run a battery down until it’s completely dead, but deep drains aren’t good for modern battery chemistry. Also, with older nickel-cadmium batteries, it was recommended to drain them completely before storage. That’s not the case anymore. The best way to avoid deep draining is by keeping an eye on a battery’s power indicator, or cycling to a new battery whenever you think of it.

Moisture can quickly degrade the lifespan of a power tool’s battery because it can wreak havoc on the electronics and circuitry inside. What’s more, moisture can also cause contacts and terminals to corrode, which in turn causes resistance and throttles back battery output. While some jobs do require working with power tools in the elements, keeping batteries in their storage case when they’re not in use can help protect them from rain, snow, puddles, and mud.

It’s already established that heat is bad for batteries, but being warm is also a fact of life for power tools and their batteries. During use and charging, heat builds up inside the battery pack and damages the pack cells. One way to avoid this heat buildup is to allow the battery to cool during use. Allow it to cool after charging before using it, or vice versa.

If your original battery charger kicked the bucket and you replaced it with a universal charger, you might be damaging your power tool batteries. The charger that your battery came with has the circuitry and sensors to know when the battery is too hot or overcharged. An off-brand universal charger might save you some money initially, but it could kill your batteries sooner. Instead, contact your tool brand’s manufacturer, explain which batteries you own, and allow them to point you in the right direction.

All rechargeable tool batteries have between 300 and 500 recharges before they’re pretty much useless, so you have to be smart about how you use them. For instance, using a 2.0- or 3.0-amp-hour battery in a power-hungry tool like a circular saw or angle grinder will drain it quickly, requiring more frequent recharges. Instead, save the smaller amp-hour batteries for drills and impact drivers, and use the larger batteries in heavy-duty tools.

I would say that there are as many different brands of cordless power tools as there are colors in the rainbow, but there are many more than that. At the heart of each brand’s cordless systems are proprietary battery packs that are, with few exceptions, completely incompatible with other brands’ cordless tools and accessories.

The graphic above depicts 7 of the most popular cordless power tool brands on the market today – Milwaukee, Ridgid, Dewalt, Ryobi, Metabo HPT, Makita, and Bosch.

Over the years, a lot of readers have expressed their desire for a standardized tool and battery connection that is adopted by all cordless power tool makers. I don’t think this is at all realistically possible, but it’s always an interesting idea to explore.

If a user owns tools from two or more brands, it would be great to use just one brand’s battery and charger for everything. This would save the end user money, and they could skip the hassle of having to deal with multiple chargers.

I shared my thoughts about the matter 6 years ago, in a post much like this one. There has been a lot of advancement in the cordless power tool industry since then, but my opinion has not changed. If you ask me, we are extremely unlikely to see a universally-compatible cordless power tool battery pack.

Let’s say that every cordless power tool brand magically updated all of their tools, batteries, and chargers to be cross-compatible with other brands’ offerings. This would be a disaster.

If Brand A’s tools can only work with Brand A’s batteries, they can design new tools around the maximum power output of their highest capacity batteries, while also ensuring that the tool will still function, although usually not optimally, with their lowest capacity batteries.

Although I don’t know if it’s still true, Milwaukee’s M18 drills were said to receive a roughly 10% power boost when powered with an XC (10-cell) battery. Their drills would operate just fine with a compact battery, such as 1.5Ah, but an XC battery, such as 3.0Ah to 5.0Ah, would deliver greater power and torque. Would similar be possible if a tool couldn’t be designed around known battery characteristics and performance thresholds?

Talking just about 18V/20V Max power tool batteries, here’s a list of battery sizes users can choose from today. Not every brand offers all options, but most tool brands have very broad selections.

If cordless power tools and batteries were suddenly cross-compatible, what else would you need to know aside from its charge capacity? Maximum continuous power output at room temperature? And how would you know how much power you needed?

I suppose that brands could provide power requirement specs for their cordless tools. But how would that be determined? Different applications, work materials, accessories, and grades of accessories can greatly affect a tool’s power consumption. Users can also influence a tool’s power requirements, such as if they apply more or less pressure, or if they wait longer to replace dull bits or blades.

Makita’s XGT tools and chargers treat 3rd party batteries differently than genuine ones. I could envision brands doing the same in the context of hypothetical universally compatible batteries.

Universal compatibility would not mean universal suitability, and so tools might have to be designed to deliver lower performance for lowest-performing batteries users might have sourced from other brands.

While users might save money on less expensive batteries, they wouldn’t get the full performance of the tools they buy unless they stick with that brand’s batteries.

Is it wrong to wish for a universal-style cordless power tool battery? No. It’s a good thing to ask for, and I know I would surely benefit from it. But it’s not going to happen.

Cordless power tool brands do play well together when they want to. The Power Tool Institute (PTI) is a trade organization that includes the following tool brands – Black & Decker, Bosch, Dewalt, Dremel, Festool, Hilti, Metabo, Makita, Milwaukee, Rotozip, Ryobi, Stihl, and others.

A long time ago, someone told me that power tool batteries are pricey because that’s their true cost. The implication was that cordless kits are heavily discounted, and so battery prices are representative of their true retail costs. I don’t know if this is true or not, but it makes sense.

If users are free to shop around for different brands’ batteries, how would that affect the price of tools? If brands start to aggressively discount their batteries to keep users in-system, would that in turn drive up the pricing of kits or bare tools?

The only guarantee, I think, is that some users will seek out less expensive battery packs. If a less expensive battery fits, it might be assumed to be on-par or equivalent to that brand’s batteries, without this necessarily being true, and that could lead to mismatched power-performance issues.

I always try to look at this objectively, and always arrive at the same conclusion, that universal-fit cordless power tools simply aren’t a good idea. It might benefit some users, but not without the potential and even high likelihood to confuse or negatively impact many others.

For heavier duty tools, Dewalt has FlexVolt, Milwaukee has M18 High Output, Makita has 18V X2 and XGT, Bosch has Profactor, and Metabo HPT has MultiVolt. Where’s the common denominator?

How would you satisfy users’ wishes while also ensuring that tools deliver consistent performance and user experiences regardless of battery? Would might you do – if anything – to prevent a user from choosing an underpowered or lower-spec battery with a tool with high power demands?

We do a lot with both tools and batteries. A case in point is our articles on the DeWalt FlexVolt technology and the Milwaukee 9.0 Ah batteries. But what about the battery chargers that resupply energy to these batteries? As it turns out, there are possibly even more differences among battery chargers than the packs themselves. While we don’t think anyone will “jump ship” from one platform to another just because of charger technology, it’s good to know who stands out. For this article, we requested the best battery charger from every major tool manufacturer. Most responded and participated. We then took a close look at each to see how they were made. Following is our evaluation of the best battery chargers for power tools.

Notice we said WHAT makes the best battery charger, not WHO. Answering the first question really depends on your needs and how you use your power tools. As you go through this article, realize that we don’t expect anyone will shift their tool platform of choice based on a charger. What we do want to communicate are any standout features for each platform. Some manufacturers have really done something special with their tool battery charger technology. That deserves some recognition. By the end, you should know which charger offers the best benefits for your tool platform.

Also, there are chargers that exceed the capabilities of the basic models included with tool kits. Knowing that can decrease your charging time should you choose to purchase a more advanced model. For any Pros and power users wanting to increase productivity, this could rock your world.

Since we do literally hundreds of hands-on power tool reviews each year, having access to every charger was critical. When we started collecting them all, we decided the best way to serve our particular needs was mounting them to a piece of 3/4-inch plywood. On the back of the plywood, we mounted two industrial power strips which we connected to two separate 20-amp circuits. This gave us plenty of current for simultaneously recharging multiple packs from different manufacturers. We can’t run them all at once—but we’ve never needed to.

Big Picture: You can buy the DeWalt Portable Power Station with (DCB1800M3T1) or without batteries. This system not only recharges 4 batteries simultaneously, it can use those charged batteries to power your corded tools when you’re done. With its 3600W/30A of peak power output, we actually used it to operate a 120V MIG welder! It can put out 15A of continuous output, making it perfect for miter saws, circular saws, rotary hammers, and similar tools.

Highs: Parallel charging of 20V Max or FlexVolt 60V battery packs. Obvious benefits of being a power station. Pass-through power. Excellent form factor with well-placed handles and protection for battery packs. Integrates with the DeWalt ToughSystem.

Highs: Since this is a 5A charger, charging speed is actually very respectable. Hilti claims you can get one of their 5.2Ah battery packs up to 75% charge in just 20 minutes. We also love that you can use one multi-port charger to handle all of your Hilti lithium-ion batteries. Our 12V, 18V, and 36V Hilti tools are all taken care of on a single platform.

Big Picture: Fein is well-known for its high performance grinders and oscillating multi-tools. The ALG 50 charger works for all Fein Lithium-ion batteries. While this is billed as a rapid charger, we found the charging speeds to be average. Fein has yet to develop or release a multi-port charger.

Big Picture: Kobalt 24V XTR tools have impressed us with their power and features. They seem committed, and the line has seen regular updates since its debut. The 110W charger is an upgrade from the standard charger sold with most of their kits. It will recharge a 2.0Ah battery pack in less than 30 minutes. Like many manufacturers, Kobalt has yet to release a multi-battery charger.

We don’t expect you to jump ship at any point just because we identified the best battery charger. Hopefully, this article helps you know which charger is the best on your platform. Kits often come with only the most basic battery charger. Knowing how to increase your productivity with the best battery charger for your power tools could be the key to saving you time and money.

We’re most excited to see a shift towards air-cooled systems. With the integration of newer battery cells (20700 cells in particular), cooling is going to be key. It will allow for greater use of the cells, higher torque and speed in power tools, and faster charging. You can also tell a charger will be faster by the current load. If it has less than a 4A draw, it’s not a rapid charger regardless of what it may say on the box. What charger(s) have you been most impressed with? Let us know in the comments below.

A constant power supply to the vehicle electrical system is vital during diagnosis and repair work in the workshop. Energy consumption is especially high during software updates for control unit flash memories: this causes the engine management to simulate emergency running conditions of the engine, leaving many electrical components on full power for the duration of the memory update. With large engines, a 65 A current can be flowing for more than 90 minutes, whereas 45 A for 30 minutes is standard in smaller engines.

If the vehicle voltage drops to below 12 V during this process, the flash operation is cancelled by the system. This can cause irreparable damage to the control unit, incurring costs of €300 to €3,000 for a replacement part – not including additional labour costs. Unfortunately, the workshop operator has to bear these costs if no battery charging system or the wrong battery charging system is used to supply power during diagnosis or software updates.

The Acctiva Professional series of portable battery charging systems from Fronius offers a solution that provides a reliable power source for the vehicle during diagnosis and software updates. Up to 70 A guarantees that the batteries are fully charged and capable of starting in just a few minutes. Back-up mode ensures that user settings in the vehicle are retained when the battery is changed and power supply mode guarantees a constant energy supply without any support from the battery. The I-Check automatic power consumption test can also be used to determine whether a discharged battery is faulty or still functional.