How to Repair Cordless Power Tools

But let’s say you have a cordless tool, and its battery is failing. Can you fix the battery? Of course you can. You are Hackaday readers, you’ll all be aware that inside almost all cordless tool batteries you’ll find a set of standard off-the-shelf cells wired together, C or D cells in the case of NiCd or NiMh Bosch power tool batteries, and maybe 18650 cells for LiIon. If you can defeat the efforts of your tool manufacturer to discourage battery pack dismantling, you can have them out on your bench, and replace them.

Of course, there is a snag to replacing cells in a pack. This isn’t like the spring-loaded battery compartment in your radio, each cell will have spot-welded metal strip conductors linking it to its neighbour, and you’ll have to come up with a way of replicating that. If you’re lucky you’ll find solderable batteries, otherwise you’ll have to consider a battery welder. But if you can overcome that hurdle, you should at least be able to replace your cells without breaking the bank.

You will be unlikely to find a tool with a NiCd battery for sale new these days, but there are still huge numbers of older ones with dead packs to be found often at next-to-no outlay. It’s not the safest of exploits, but it is possible to rejuvenate dead NiCd cells with the application of short bursts of high current. The theory goes that metal crystals grow in the cell and short it out, and the high current blows these metal crystals and brings the cell back to life. There are tales of this being performed with hefty bench power supplies, car batteries, and arc welders, though you may wish to research carefully before you give it a try.

Finally, who needs cells? If you have a suitably powerful low voltage supply, why not run your tool directly from it and forget about the battery pack? Of course, you lose the ability to run it as a cordless tool, but if it came to you at very little cost than that should present very little hardship. Try a modified PC power supply if it’s a 12 V tool, or a lead-acid pack if it isn’t.

So we’ve got past my rant about the iniquity of the built-in obsolescence of cordless power tools, and identified several ways that we as resourceful Hackaday readers can benefit from the cast-offs of others whose batteries have reached the end of their lives. It doesn’t change my personal view that I’d always still buy a tool with a cord by choice, but at least there are ways forward for those stuck with failing cordless tool battery. Do you share my feelings on this topic?

My battery pack had a thermister that aged, and was also susceptible to corrosion. It was unidentifiable by the time I saw it. If I knew what to replace it with, and had a strong confidence in not burning down my house or drill, I would rebuild it myself.

I’m not much into power tools, but I see the category is a huge opportunity for vendor lock-in and reduced tool quality (it’s battery-powered, so less sturdy, etc), and clearly some vendors have taken advantage.

Is the usefulness of battery tools that there is no cord, or that you’re independent of the grid?

It seems to me a good option would be a separate battery pack with an inverter, from which you could operate several corded tools. Aside from the cord issue, you’d have just one battery to charge rather than many, it would be separate from the tool, so would not affect handling, and could be larger and therefore higher capacity/power Dewalt cordless drill battery. it could be non-proprietary relative to the tools, and you’d be able to use more ‘standard’ corded tools.

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Picking the Right Power Tools for Your Own Needs

A lot of time when people need new Panasonic power tool battery they will either go to the store and look around, do a little research online, or maybe even ask friends or family for recommendations. This is a good way to get some opinions.

If you are going to be going to the store to check out what is available, it is best to be prepared ahead of time. You should familiarize yourself with common trends for each type of tool you need and then figure out what features are the best fit for your situation. You can save yourself a lot of money by looking at what you need rather than what is the “best”.

What are some example of what I’m talking about? Let’s take a look at the example of cordless drills and drivers. You might be tempted to buy something that has Lithium Ion batteries and hammering action, and possible 18 volts of Milwaukee cordless drill battery. That would be nice, but it will also be expensive. The description of what I just threw out there is for contractor grade tools.

What are you going to be using the drill for? Let’s say that you are planning on building some light furniture and maybe will use the drill on weekends mostly. You probably don’t need a super powerful drill with the most expensive battery technology. You could probably get by with a 12 volt drill, no need for hammering action, and you could probably do fine with a NiCad battery as opposed to Lithium Ion. Sure, a Lithium Ion battery would be really nice, and would charge faster, but if you aren’t planning on using the drill for continuous hours at a time you could save a few bucks in this department.

See what I’m doing here? I’m trying to find the specific features that I probably do need, and then going out and finding a tool to match those needs. This will help me to maximize my dollars and get what I need all at the same time, rather than blow all my money on a battery for power tools that may be a bit overblown for my needs.

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Ways of Choosing a Laptop Battery

Laptops are eating up PCs’ market shares for its portability. But if you want to take advantage of the laptop’s portability, you need to make sure the battery of your laptop is durable enough. If not, you need get a new replacement lap top battery. So how to choose a Fujitsu laptop battery?

The first thing you should consider when you choose a laptop battery is the reputability of the batteries. There’re many laptop manufacturers on the market. If your budget is not so tight, then the best choice would be a battery made by the manufacturer of your laptop. But those batteries would be much more expensive than the average price in the market. Dell, for example, has been known to charge four times more than ones you can get elsewhere. Therefore, if you don’t want to pay the high premium price, you can get one from a different manufacturer.

Actually many famous laptop battery manufacturers don’t actually manufacturer, instead they are the brander of the product. For instance, if you open up a genuine Samsung laptop batteries, you may find that the power cells inside are actually made by Toshiba, Panasonic, or a similar big name company. Many third party brands use the exact same power cells as original manufacturers, and they cost much less than the original ones.

Another thing you should consider is the type of the battery. Normally there’re 4 main types of laptop batteries: nickel cadmium (NiCad) battery, nickel metal hydride (NiMH) battery, Lithium ion (Li-Ion) battery and Li-Poly battery. NiCad battery is very old and primitive; it’s rare in the market now. Ni-MH is newer and more advanced, but is not as good as its Li-Ion and Li-Poly counterparts. Li-Ion and Li-Poly are the most advanced and common types of batteries on the market. You should be clear what type you laptop battery is, because most of the laptops are designed with one type of batteries and cannot be used with other types. For example, if your original HP laptop computer battery is Li-ion, then you should get a Li-ion replacement battery.

Another important thing you should really pay attention to is the power rating of the battery. Batteries with the same physical size may vary greatly in power ratings. Normally batteries are rated by Volts and Amperes, though most companies show battery ratings with Volts and Milliamperes (or mAh). One thousand Milliamperes equals 1 Ampere. However, some batteries have both different Volts and Milliamperes, then it’s hard to compare which one has stronger power. Actually there’s another way to rate the power: by Watt-Hours. Watt-Hours is just multiplying the Volts and the Amperes together. So you can easily find out which battery has more power.

There’s one more thing you should be noted: be careful with the used or refurbished batteries. Because refurbished batteries do not hold as much power when compared to new LG notebook batteries. Also, they can kick the bucket on you randomly since you really do not know how old the battery is.

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Power Tool Battery and Electric Drill

An electric drill is doubt the most commonly owned by homeowner working on their home improvement tasks and is most likely the first Milwaukee power tool battery purchased by the newbie.

There are two major kinds of electric drill the corded and cordless which comes with their own pros and cons.


Corded electric drills have a dangling wire and plug which requires an electrical supply. As a result it can restrict your working range from an electric socket but you can extend your range by using an appropriate extension. When you in the range of a socket, this power tool is simply plug it in and begin drilling thing.

They tend to have more power and have higher speeds as compare to cordless version. With the exception of the smallest drills, they are usually overly bulky to be utilized by simple screwdrivers.

The power rating for corded electric drills is usually used is wattage in the UK and horsepower in the USA. The drill with the higher wattage equals to a more powerful drill. Most household models are in the scale of 500 to 1000 W.

The strength of a single drill is usually revealed by its wattage, a higher wattage Dyson Vacuum battery should is equipped with more sturdy bearings and gearbox. A low wattage drill that is stretched will be operating at maximum power every now and then would be pushing its bearings closer to their limits. While a higher wattage tool will use lesser effort to performance the similar job, with a resulting in reduction of wear and tear. In plain terms, the more you are going to work the drill, the higher the input wattage should be.


In the recent years, cordless power tool like the electric drills have achieved immense progress and can offer same performance to the majority of corded drills.

The distinct advantage over the corded version is that they are not restricted by the wire, but it relies on the limited power of the battery pack. Fortunately, majority of models come with replaceable battery packs and include a spare, the electric drill will come back life with a fully charged battery pack.

Voltage is usually used for rating these type of power tool, the higher the voltage, the more power it has. Most household models come in the range of 9.6 to 16 volts battery pack, there also some that come in 32 volts battery packs which are targeted for the professional usage.

It is an obvious advantage to have a minimal of a single replaceable battery pack. Various kinds of cordless drill batteries are utilized on various models; the two general types are Nickel Metal Hydride (Ni-Mh), Nickel Cadmium (Ni-Cd).

To sum it up, we have gone through the two different version of this power tool. Generally corded drills offer higher power and higher maximum drilling speeds than cordless ones. However, cordless drills offer higher flexibility without the hassle of messy wires.

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Evolution Of Rechargeable NiMH Batteries

The widespread use of Rechargeable NiMH Batteries owes its roots to the early years of development of rechargeable battery technology.

The first rechargeable bosch drill battery was the lead-acid battery invented in 1859 by a French physicist by name Gaston Planté. Widespread electrification in Europe led to the use of storage batteries for portable lighting systems, telegraphy, and back-up power. The most remarkable use of these batteries was for electric cars and probably here the rechargeable batteries found the largest market. But eventually, internal combustion engines prevailed for a host of advantages and so petrol-driven cars replaced electric cars.

Nickel cadmium cells made its appearance in 1900 and found acceptance where more power was needed. But, a drawback of both lead-acid and nickel-cadmium batteries was they produced a lot of gas when overcharged. A German engineer by name Neumann plugged this issue by making possible a sealed version. By 1960s sealed batteries were widely available. For most part of the last century lead-acid and Nickel-Cadmium batteries dominated the market. Even today small lead-acid battery packs provide the initial bursts of power in almost all cars, whereas nickel-cadmium batteries provide emergency backup power for aircraft and trains.

Technological evolution is an inevitable part of our life. It is not surprising therefore that better batteries sooner or later had to make their appearance. Nickel-metal hydride battery came into the market in 1989. These batteries had an advantage of storing twice as much energy as that of lead-acid batteries for identical weights.

Rechargeable NiMH tool batteries have become all-encompassing in today’s technological climate, powering everything from laptops and cellular phones to hybrid electric vehicles.

The development of NiMH battery traces its origin to the nickel-hydrogen batteries used for aerospace applications. Nickel-hydrogen batteries were specifically suited to aerospace applications because of their exceptional life cycle and acceptable specific energy. But, the drawbacks were poor volumetric efficiency and the need for tanks of hydrogen gas and platinum catalysts. NiMH batteries overcame this problem by configuring a battery using metal hydride storage materials as one of the electrodes. The sustained work done in multi-component metal hydride alloys has been singularly responsible for the current generation of high performance and durable Rechargeable NiMH Batteries. These are in use today in nearly every application you can think of.

The NiMH battery is actually an alkaline storage battery because it uses potassium hydroxide as the electrolyte. Rechargeable alkaline batteries found wide application for the following key reasons.

* High electrolyte conductivity.
* The battery system can be sealed to plug leakage problems.
* Operable over wide temperature ranges.
* Longer life and durability compensating for higher initial costs.
* Higher energy density and lower cost per watt-hour.

One significant technological development in Rechargeable NiMH Batteries is in the field of battery packs used in hybrid electric vehicles. The battery packs are now considerably reduced in size, weight, and cost, without compromising in power, reliability, and life expectancy. This has enabled these batteries to be selected for mass production of hybrid electric vehicles (HEVs) of makes such as Honda Insight and Toyota Prius. Adapting the NiMH battery technology to cars was no mean feat because the way batteries work for hybrid cars is very different from the way they work in portable devices. Rechargeable NiMH Batteries in laptops and cell phones are designed to discharge over a period of several days. Dyson batteries for hybrid cars, on the other hand, need to sustain for several years and must endure umpteen cycles of absorbing power, regenerative braking, and supplying short bursts of power.

Hopefully, in the near future rechargeable NiMH Batteries or its successors will have wider and more extensive applications and will make us use gas engines less and less.


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How to Choose the Right Cordless Drill

A cordless drill is essential for anyone who enjoys woodworking, masonry, home improvement, or any other hands-on construction activities. This wonderful tool allows you convenience and mobility that is difficult to attain in a traditional corded model because there is no need for finding a close outlet or maneuvering around a heavy extension cord. There are thousands of models of cordless drills on the market today in prices ranging from well below $100 to more than $1,000. How can you choose the cordless drill that is best suited for you? Selecting the perfect Ryobi cordless drill battery can be easily accomplished by looking at a few important factors.

First you should evaluate your needs. Think of the conditions and durations for which you intend to use it. If you will only be using it for small, everyday activities, you hardly need a $1,200 professional drill. Alternatively, if you plan to do massive projects or heavy-duty drilling, you may prefer a higher-end drill that has additional features such as a ½” chuck as opposed to the traditional 3/8″ chuck. Also decide if you need a keyed or keyless chuck. A keyless chuck makes it faster and easier to change bits but a keyed chuck can be more secure for heavy jobs.

Another thing to consider when choosing a cordless drill is the battery type and size. The newer Nickel-Metal-Hydride batteries are smaller and last longer than the Nickel-Cadmium batteries. If you only intend to use your drill occasionally for small jobs, the minimum recommended power is 9.6v. You may want to stay with 12v and above, however, if you will be doing larger jobs. Often, drills in the 14.4v to 18v range can be found for under $100 and provide a better value for the dollar than smaller drills. It is important to remember that more voltage means a higher drill weight, something to consider if you will be holding it for very long periods of time.

Once you have a basic idea of the type of Black & Decker power tool battery you are looking for, make a trip to your local home improvement store and try out several models for performance and function. Don’t overlook things like padded or rubber grips. These seemingly unimportant features can make a big difference after holding the drill all day. While testing models, check for clutch change settings. The perfect setting for you depends on your strength and hand size. More available clutch setting choices give you more control over the speed of the drill.

After you have narrowed your choices down a bit, check the cost of replacement batteries. If you are buying a cordless drill to last, you don’t want to find out later that the replacement batteries cost as much as a new drill. Also find out the life expectancy of the included batteries. You may find a slightly more expensive drill is a better value than a cheaper model once battery life and cost is added into the equation.

By taking the time to do your research and test several options, you can be assured that you will find a cordless drill that you will be happy with long-term. So do some testing, compare some options and low prices power tool batteries, and pick your perfect drill. You will be checking items off of your to-do list in no time.

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Bosch Litheon Batteries Exposed

Perhaps one of the biggest hurdles for manufacturers to overcome with cordless tools is the Bosch 2 607 336 915 drill battery itself. Sure, they must give strict attention to the efficiency of the motor. They must select a motor that can deliver more power output with less draw on the battery.

However, the battery is a very serious part of the equation. That’s why the Bosch Litheon is so popular.

Lithium batteries are known for providing higher cell-density. That means twice the power for twice the duration. You get more of everything.

Remember how big cell phones used to be? I remember the battery pack alone on one of my first Motorola phones. It was bigger than just about ANY cell phone on the market today.

Cell phone batteries are Lithium based.

Bosch GBA 36V tool batteries (lithium-ion) provide much more power than Nickel-Cadmium which means less voltage is necessary for comparable performance.

For example, the Bosch 10.8V drill/driver can do 80% of what the typical user is going to need to do. A 10.8V Litheon battery is very small, while still providing the kick and endurance needed.

A smaller battery means a lighter drill to carry around.

If you take an 18V Ni-Cad battery and a 36V Litheon battery, you’re actually going to see TWICE the power and TWICE the duration. You’ll be able to do more, and do it longer.

Another benefit of the Bosch Litheon is the lack of ‘memory effect’. Ni-Cad batteries (as well as other types) tend to develop a memory that keeps them from charging to full capacity if not fully discharged.

Lithium-ion batteries don’t have this problem.

Granted, these batteries are more expensive to manufacture (and drive the cost of tools up), however, that price is offset by performance and time lost recharging, as well as the life of the battery.

Yet another benefit of Bosch Litheon is that Lithium-ion D-70771 batteries have an extremely low self-discharge rate. Self-discharge is what occurs when you charge the battery and leave it on the shelf. Lithium-ion batteries self-discharge at around 0.1% each month, which means you’ll lose around 1% of charge over a year’s time – not much to worry about.

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Building and Repairing Things Become Fun With The Right Power Tools

Let’s imagine you are about to start a huge renovation project in your apartment or a big house your family owns. Yes, you have good reasons to freak out since they say that renovation never stops once you get started. When you have a renovation project and you are given a Black & Decker A1718 battery to help you do it, you will find that work progresses a lot more quickly. Yes, tools make life easier because they ease the work man has to do with his own hands. Today, tools are a part of almost every household. Every home needs a screw to be fixed or some woodworking to be done. If you are a professional craftsman or woodworker, you will need tools even more as they are crucial to earn your living. On the one hand, one may think that purchasing and using power tolls is a breeze. Yes, there are lots of tools and gear for homeowners these days. You can buy them online and offline. There are plenty of brands, to offer decent products at low prices. Modern tools sell all over the world. Makita, Bosch, Dewalt, Hitachi etc. are renowned brands that manufacture and sell modern tools all over the world.

Gone were the days when people depended on their sheer physical strength to get manual work done. In the past, people relied on hammers, saws, grinders and wrenches to be able to do their repair or construction work. Today, these tools are still useful but one can accelerate the efficiency of their work by using what are called as “cordless power tools”. There are many advantages to cordless tools and not having to constantly untangle wires and cables is undoubtedly one of them. It also helps to flick the switch on the screwdriver knowing you don’t have to apply any brute force to get the desired results.

The following are examples of the most commonly used cordless equipment:

DeWalt cordless – DeWalt cordless tools are well known for the power they have available and for their batteries that are long lasting. The DeWalt cordless tools are ideal for those situations where electric outlet is not available or easily accessible. The extended life battery that comes standard with the cordless line of Black & Decker A18 drill battery is longer lasting than other similar tools available. This together with the durability and simple accessory swapping that Dewalt power tools provide, and you can easily understand why they are so popular and in high demand. DeWalt Cordless Tools are built for every day routine and heavy-duty applications.

Hitachi tools – Hitachi tools are the most reliable products available. If you buy Hitachi, you can be ensured of buying quality products that won’t cost a hole in your purse. It has an impressive line of tools and because of the huge range; it is easier for you to choose. Everything from band saws, circular saws, cut-off saws, miter saws, reciprocating saws, drills, drill presses, drivers, hammer drills, etc. are available. With Hitachi, you can be assured of top- quality results that will please you. Never buy a tool without expert review.

It is a good idea to spend some time with a professional.

Bosch tools – Bosch tools are the best in the industry of tools. They are the most trusted name anyone can think about. They are the oldest player in this field. The Bosch tools are synonyms with the uniqueness and the comfort. They provide better output and that is the reason they are highly trusted. This is not because it is one of the oldest but because of the deliverance by the Bosch tools. They have given the best of the result with all the satisfying result. No one has questioned their loyalty. That has made them the champion for the long time.

There are many other cordless power tools and equipment that anyone can use for everyday situations. However, it is also useful to understand that these come in many different brands, types, and prices of Black & Decker HPB18 battery. While you may get a good bargain for discounted tools, purchasing original, durable and branded items are proven to be the best option for long term use.

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Batteries Are the Key of the Cordless Power Tools

Hitachi power tool batteries are the key to any cordless power tool, whether choosing a cordless drill, hedge trimmer, leaf blower, or any other type of cordless tool. Battery voltage is not the single most important factor to consider when choosing cordless power tools. With cordless tools available all the way up to 36 volts, amperage/hour, and battery type must also be taken into account. Many 14.4 volt tools will outperform 19.2 volt tools due to battery type and amp/hr rating.

Battery Rating Basics

Amperage hours and voltage are used to rate a cordless tool battery. Amperage hours are used to determine how long a battery will last and voltage refers to the flow or strength of the electrical current. As I was taught in high school shop class the theory of electrical current is easier to understand if you think of it as water being pumped through a pipe.

•Voltage is used to measure the speed at which water is flowing through the pipe.
•Amperage represents the size of pipe that will be filled to capacity.
•Amperage hour rates how long the flow can be maintained or how long the battery will last.

As you can see by using this analogy the higher the voltage in conjunction with higher amp/hr the stronger the battery. Panasonic power tool batteries are usually available in 1.4, 2.4, and 3.0 amp/hr. The amp/hr rating of the battery can be found on either the side or bottom of most batteries.

Battery Types

There are three types of batteries used in modern cordless power tools.

• Ni – Cad ( Nickel – Cadmium ) are the oldest type used and are prone to developing a memory and early failure. Even when properly maintained they are lucky to be recharged 400 times before failure occurs.
• Ni -MH ( Nickel Metal Hydride ) are a newer design than Ni – Cad and can develop a memory, though not as quick. The worst issue discovered with this type of battery, the higher the amp/hr rating, the fewer charge cycles before battery failure occurs.
• Li – Ion ( Lithium – Ion ) are the newest type available and much better, compact, and expensive than the other two types. Memory is not a problem, and manufacturers claim up to 1,200 charging cycles before replacement.
Charging Time

Is another important consideration when considering cordless power tool batteries. Many older batteries need charging after only an hour or less of work and require six hours of charging time. If you have a lot of work to perform can you afford to wait for your batteries to recharge? There are Lithium – Ion batteries available that only require 15 minutes to recharge.

Stability and Maintenance

With the high cost of replacement batteries for cordless tools it pays to follow manufacturers recommendations for the care and maintenance of these tools. Cordless power tool batteries are just like any other piece of equipment and have an expected service life. When they become worn out and need replacing it is sometimes more economical to replace the entire tool kit. The cost of two replacement batteries is often times more than a new cordless tool with charger and two Ryobi power tool batteries.

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Jumpstart a Power Tool Battery and Bring It Back to Life

When your power tool battery charger displays the dreaded flashing red light, it usually means it’s time to get a new battery. But before you get rid of that Panasonic power tool batteries, try this trick to bring it back to life.

First, a disclaimer: We don’t advise hacking or tampering with your lithium-ion batteries beyond what the manufacturer recommends. If you get a battery failure, read the instruction manual or contact the manufacturer directly for repair information. Basically, it’s dangerous to play around with batteries, as they can be a fire and explosion risk, so proceed at your own risk.

That said, cordless battery replacements aren’t cheap, and this has spurred a few creative individuals to try jumpstarting their batteries with seemingly good results. They set up a seemingly dead battery next to a fully charged one, and using two wires, they connect the matching polarity between the two batteries. After a few minutes the bad battery is then placed on the charger and (with any luck) starts charging again.

This may be only a temporary fix, and even if it works an underlying Hitachi power tool batteries problem may still exist. But if you’re brave, you might be able to coax new life from an old battery.


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