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March 22 2017 4 22 /03 /March /2017 13:54

With the large number of portable devices we use every day, it is no wonder that we have a lot of Bosch 2 607 335 735 batteries to recycle. Using rechargeable ones, such as nickel cadmium (NiCad) batteries, cuts down on some of the waste. Unfortunately, even rechargeable ones eventually stop working and need proper disposal. Since nickel cadmium is a known carcinogen for humans, many countries have programs in place to recycle them safely. In most cases these programs are offered free of charge as well.

Consult the Organisation for Economic Co-Operation and Development (OECD)'s website for the most current information on locations where you can dispose of NiCad batteries properly worldwide.

Follow the web links the OECD provides to find out more about existing recycling facilities in your area as well as their hours of operation.

Phone ahead to make sure that the facility you plan to visit with your batteries will be open at the time you choose to visit. While many people try to keep their websites as up-to-date as possible, sometimes that information is not the most current. Speaking to a person on the phone will always give you the most up-to-date information.

In many places, it is illegal to dispose of batteries through any means other than recycling. In the case of NiCad batteries in particular this is because they have the potential to release toxic metals and chemicals if they are not disposed of properly. Check with your local government for rules concerning your area. They may even have a local recycling program set up where you can drop off your Bosch PSR 18 VE-2 batteries at the same time you are taking care of other local governmental business, such as renewing licenses or paying bills.

When recycling nicad batteries, companies that process them can reclaim some of the iron-nickel and cadmium used in their manufacture. These metals are then used in the manufacture of new batteries, steel and other durable household goods.

When recycling your nicad batteries, you may also wonder about recycling other types of batteries in your household. Most automotive parts stores will dispose of your automotive batteries if you drop them off. As for other types of batteries (both rechargeable and otherwise), it is best to check with your local government to see what the current preferred method of disposal is.

When talking about nicad batteries, it is important to note that all nicad batteries are included in this discussion--not just AAAs, AAs and the like. Check your cell phone, digital camera and other small portable electronic devices to see what types of rechargeable batteries they have. As of February 2010, lithium ion and nickel cadmium are the most widely used rechargeable Bosch 2 607 335 414 batteries for these types of devices.


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March 21 2017 3 21 /03 /March /2017 15:14

Nickel Cadmium (Nicad) rechargeable Bosch BAT025 batteries are a popular battery choice for use in appliances, games and tools. Over time, even these long-lasting batteries will use their capacity to hold a charge. Nicad batteries can be repaired, instead of replaced, for even longer use. Zapping the Nicad battery with an electric current will enable a dead rechargeable battery to hold a longer charge.

Use the battery tester or digital multimeter to test the dead Nicad battery to make sure it is fully discharged. If it still holds a partial charge, continue to drain the battery in normal use or use the discharge function found on some appliances and electronics.

Find both the positive and negative nodes of the dead Ni CAD battery. The positive node will be raised, and the negative node should be flat.

Protect yourself during this procedure by wear safety goggles, gloves and a long-sleeved shirt.

Begin repairing the Nicad battery by attaching the black alligaotr clamp from the 12-volt charger to the negative end of the battery.

Touch the red alligator clamp to the positive end of the battery three or four times, using light taps. Sparks may be emitted from the Bosch 2 607 335 250 battery during this process.

Immediately hold the red and black clamps on the battery, releasing them after a maximum of two seconds.

Test the battery to see if it has been completely charged. Repeat process if necessary until the battery is fully charged.

Be prepared to wear safety gear during this process to avoid injury.

The Nicad battery repair process is best performed by someone familiar in working with electricity.

Overcharging the Bosch BAT011 battery can lead to fire, explosion or battery acid spray.

Individuals attempting this process need to understand the danger and understand that they perform the process at their own risk to injury and damage to self, property and others.

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March 16 2017 5 16 /03 /March /2017 18:32

Cordless 18-volt drills come with a rechargeable Bosch 2 607 335 535 battery pack. The battery pack is made up of several rechargeable nickel-metal hydride (NiMH) battery cells. After long periods of repetitive recharging, these battery cells will either hold a weak charge or will not hold a charge at all. In either case, it is possible to replace individual or entire rows of NiMH cells in a drill's battery pack. However, doing this yourself requires dismantling the battery pack, which in some cases, means damaging the pack's plastic housing.

Remove the 18V battery pack from the drill's handle or the external battery charger. Release the battery pack by pressing on the release tabs on either side of the pack.

Relocate the battery pack to to a flat work table, preferably in a garage or workspace that is separate from your home. Determine how the battery's outer housing is held together. In many cases, the battery's outer casing is secured by a few Phillips screws or it is one solid piece of plastic. Remove the screws, as necessary, but if the pack's housing is one piece, cut it open to access the cells of Bosch 2 607 335 536 battery.

Attach a chisel tip soldering iron to a soldering gun. Plug in the gun's power cable and allow the iron to heat up for about 10 minutes. Firmly touch the chisel tip iron to the crease lining the center of the battery pack. Press down firmly on the crease with the iron, and run it along the battery pack's crease to cut open the battery pack's housing. Grasp the top section and remove it from the pack to reveal the internal battery cells.

Turn on a voltage meter and touch the red probe to the positive side and the black probe to the negative side of each battery cell. The meter will tell you which cells have a charge and which cells are dead. Note the polarity alignment of the battery cells for when you install new cells.

Touch your heated soldering iron tip where the wire connector's meet each battery cell. Desolder the wire connectors of each dead NiMH cell you want to replace. Remove the desoldered battery cells. In many cases, the cells will be glued together inside the pack. Use a razor blade or similar tool to separate the dead cells from the pack.

Place the replacement NiMH cells inside the cell pack into their appropriate slots. Make sure each battery is aligned properly with the other cells in the pack. Touch the wire connectors to the positive side of each new cell. Use the soldering iron and some fresh solder to attach the wires to each new battery cell.

Place the cell pack back inside the dismantled housing. Place the top section of the battery pack's housing back onto the bottom section of the housing. Replace any retaining Phillips-head screws, as necessary. If you cut open the Bosch PSR 18 VE-2  battery pack's housing, secure the two housing pieces together with a strong plastic adhesive or duct tape.

Performing this procedure yourself is likely to void any warranty that might otherwise be in effect.


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March 15 2017 4 15 /03 /March /2017 18:27

Unlike rechargeable Bosch 2 607 335 082 batteries, alkaline batteries, also known as "primary batteries," have one life cycle. Once their power is depleted, they must be discarded. Alkaline batteries should be stored at room temperature; many can be stored for at least two years and still hold most of their original power levels.

Test AAA, AA, C, D and button alkaline batteries with a battery tester. Hold the tester in your hand and raise the bar located at the top of the tester all the way up. Place the battery right-side up between the arm and the top of body of the battery tester. Push the arm down so the alkaline battery fits snugly.

Read the measuring meter or display on the battery tester. If it has a meter, wait for the needle to stop moving before you determine how much power is left in the alkaline battery. The readings usually include "Low," "Replace" or "Weak"; "Good" or "Normal"; and "Strong" or "High."

Check a 9-volt alkaline battery by connecting it to the side of the tester. Insert the positive (+) terminal into the smaller hole. Push the negative (-) terminal--which resembles a hexagon or octagon--into the larger hole. Hold the battery firmly in place while the Bosch BAT019 battery tester takes a reading.

Standard alkaline batteries normally are used in low-to-moderate current drain devices such as remote controls. Premium alkaline batteries are useful in high drain devices such as digital cameras, CD players, MP3 players and radio-controlled toys.

When you test an alkaline battery, make sure the positive (+) terminal is touching the metal on the tester bar. Make sure the negative (-) terminal is touching the metal plate on top of the battery tester. If the battery is positioned incorrectly, the tester may say the Bosch 2 607 335 711 battery is dead or give no reading at all.

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March 11 2017 7 11 /03 /March /2017 00:47

NiCad and NiMH Makita power tool batteries are amongst the hardest batteries to charge. Whereas with lithium ion and lead acid batteries you can control overcharge by just setting a maximum charge voltage, the nickel based batteries don't have a "float charge" voltage. So the charging is based on forcing current through the battery. The voltage to do this is not fixed in stone like it is for the other batteries.

This makes these cells and batteries especially difficult to charge in parallel. This is because you can't be sure that each cell or pack is the same impedance (or resistance), and so some will take more current than others even when they are full. This means that you need to use a separate charging circuit for each string in a parallel pack, or balance the current in some other way, for example by using resistors of such a resistance that it will dominate the current control.

The coulometric charging efficiency of nickel cadmium is about 83% for a fast (C/1 to C/0.24) charge, and 63% for a C/5 charge. This means that at C/1 you must put in 120 amp hours in for every 100 amp hours you get out. The slower you charge the worse this gets. At C/10 it is 55%, at C/20 it can get less than 50%. (These numbers are just to give you an idea, battery manufacturers differ).

When the charge is complete oxygen starts being generated at the nickel electrode. This oxygen diffuses through the separator and reacts with the cadmium electrode to form cadmium hydroxide. This causes a lowering of the cell voltage which can be used to detect the end of charge. This so-called minus delta V/ delta t bump that is indicative of end-of-charge is much less pronounced in NiMH than NiCad, and it is very temperature dependent. Many of the chargers listed here use a sophisticated algorithm that uses the -deltaV to accurately charge NiMH and NiCad Bosch power tool battery packs.

As the battery reaches end-of-charge oxygen starts to form at the electrodes, and be recombined at the catalyst. This new chemical reaction creates heat, which can be easily measured with a thermistor.. This is the safest way to detect end-of-charge during a fast charge. This method is often used with multi-cell packs and the 20, 30, and 40 cell pack chargers.

Nickel cadmium battery chargers should cut the charge off when the temperature exceeds the maximum charging temperature of power tool battery for Dewalt, typically 45 degrees C for a controlled fast charge, and 50 degrees C for an overnight or fast charge.

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February 27 2017 2 27 /02 /February /2017 17:59

Eighteen-volt Panasonic cordless drill batteries are actually multiple low-voltage batteries wired in series to produce 18 volts. The ability to resurrect an 18-volt battery depends on the type of cells the battery pack contains. If the cells are nickel cadmium or nickel metal hydride it's likely they can be resurrected. But if the pack contains lithium ion or lithium polymer cells, there is little you can do and the best option is to purchase a replacement.

Look on the battery pack label to determine if the cells are nickel-based or lithium-based. It will say "NiCd," "NiCad" or "NiMH" if they're nickel-based and "Li-Ion" or "LiPo" if they're lithium-based. Only attempt to resurrect the pack if it contains nickel-based cells.

Recharge the 18-volt battery even if the battery appears not to take a charge. You need to start with the highest charge possible to resurrect the battery pack.

Remove the battery from the charger once the charger indicates the battery is full.

Put the battery into the device it operates. Batteries that produce 18 volts inevitably operate power tools and, as they are motorized, it's sensible to put the power tool into a small vice so it's held in place. Otherwise you must hold the tool during the resurrection process, which can be tedious.

Put a cloth around the handle of the power tool to protect it while it is clamped in the vice. Open the vice and place the handle of the tool into the jaws. Slowly close the jaws so they tighten onto the handle. Don't tighten too much, but make sure the tool is secure.

Turn on the Milwaukee power tool battery. Let it operate continuously. After a while you find the motor starts to slow, but keep it running until it completely stops.

Turn off the power switch once the motor stops. The battery and the tool will be quite hot, so let it cool down for 30 minutes or until it feels cool. The procedure of continuously running the power tool and the warmth generated starts to break down the nickel crystals in the cells. This lets them release more energy and enables them to retain more power once the process is complete.

Be sure the power tool is still secure in the vice. Turn on the tool and allow it to operate until it stops as before. It does not take very long this time. The crystals are breaking down each time you restart your power tool.

Turn off the power tool once it stops operating. Leave it for a few minutes and then repeat the process. Continue to repeat the process until you find it does not operate at all. This means the battery is completely discharged; the crystals have broken down and can now retain more energy.

Remove the power tool from the vice. Remove the battery and place the battery in the charger. Turn on the charger and let it charge the battery until it indicates it's full. Be prepared to wait longer than you have done for some time. The longer it takes to charge the better the resurrection process is.

Turn off the charger once the battery for power tool is charged and remove the battery from the charger. Don't leave batteries in chargers as they can start to discharge even though they are not in use. Put your resurrected battery into the device it powers when you want to use it.



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February 2 2017 5 02 /02 /February /2017 12:55

Dewalt has grown to be among the leading manufacturers of battery-operated power tools, offering dozens of different models and types to suit nearly every need. Batteries offer a versatility and mobility unseen among electric tools, but will always eventually drain and need to be recharged. Dewalt tools are most often sold with a battery charger to accompany the Dewalt DE9071 battery, and the task of battery charging is generally a straightforward one.

Press the battery-release button (located on the battery) and pull the battery from its tool.

Slide the battery into the battery charger until it stops or you hear a click (locking mechanism).

Verify that the battery charger is plugged in and the Dewalt DE9072 drill battery is charging; an indicator light on the charger will be lit when powered and charging.

Remove the DE9074 battery from the charger when the charge light (on the charger) turns green, indicating a full charge. For chargers with a locking mechanism, the battery can be removed similarly to step 1.

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January 18 2017 4 18 /01 /January /2017 10:17

From the time the trigger is pulled, to engaging a load, there is a lot that happens in a power tool. This is particularly true when the tool encounters a load that is beyond the capabilities of the motor, causing it to begin to overload or overheat. Then, there’s the battery discharging and charging process. Combine this with how and where the electronics are located, and you can see that these next generation lithium-ion tools are not your father’s cordless tools! If you want to try and understand, here’s how we break down what’s really happening:

1. Slap the battery on the tool. The Hitachi power tool battery and tool say, “Hello,” and the electronics in the tool analyze the battery to determine how the tool can work with it. It knows whether this is a Slim or Fat pack and how much reserve it has in order to get the work accomplished.

2. Pull the trigger. The temperature is checked at battery. The tool asks, “How much energy can you give me?” while the battery queries, “How much do I need to do what you are demanding of me?” The tool continues analyzing the load, and the battery gives more (or not) based on heat and energy flow.

3. Rinse. Repeat. This analysis of what can be safely delivered occurs over and over at the millisecond level to ensure the tool’s safe operation. Simultaneously, the electronics make sure not to discharge the battery too far.

4. Charging. When a battery is placed on the charger, it’s analyzed. (Now, the charger, in effect, says, “Hello.”) The battery temperature is checked, and the pack is allowed to cool down before charging if needed. Charge time on a completely discharged battery may differ from a partially depleted battery due to the front-loading effect.

PTR: Can you tell us anything about where you see the future of lithium-ion Panasonic power tool batteries technology moving?

Jason: Well, lithium-ion batteries are a technology that is constantly being watched. There is “what’s possible” vs. “what users need”. What was nice about our new 4.0Ah lithium-ion batteries is that, thanks to the sophisticated work we did on the electronics, the new battery didn’t require a complete redesign. Rather, it just analyzed the new available power schedule and adapted tool and battery accordingly. Basically, the electronics will understand that they can push harder or run longer. So the future is definitely improvements in the cell chemistry and perhaps even gradual improvements to the way the tools and batteries communicate.

Paul: The challenge for manufacturers is that in the marketplace you’ll continue to see people pushing the far edges of what can be done. Car manufacturers are all over lithium-ion battery technology right now, and certainly, it plays some part with the green energy people. Take it all into account and the maturing of lithium-ion batteries has a lot of potential. We’ll most certainly see a progression of capacity, but there will also be trade-offs that can be made with positive effects. Currently, you don’t see power tools using prismatic cells (the non-cylindrical form factors), but there is probably room to go down that path. Three years ago, people would have said these new 12V and 18V 2.0Ah and 4.0Ah AEG tool battery packs were a pipe dream. Now, gains in the manufacturing process and the new chemistries involved have allowed advanced packs like this to be made.

We want to thank both Jason and Paul for agreeing to be interviewed about battery technology…Um, particularly since neither was aware we were interviewing the other for this article. (Don’t worry, we let them both check it out to make sure we got all our details correct.) It’s hard work and innovation from guys like this (and their teams) that help bring the tools we love to market.

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January 15 2017 1 15 /01 /January /2017 13:24

In today's mobile world, battery life is precious. If you don't believe me, go to an airport and watch the road warriors. It can get downright nasty when two spot the only available outlet at the same time.

It doesn't take long to learn what helps preserve the current charge on the battery. What's not well known is how to care for the Bosch power tool battery itself. That's just as important. Doing so allows the battery to operate efficiently. Here are a few ways to keep your lithium-ion batteries healthy.

1: Keep your batteries at room temperature

That means between 20 and 25 degrees C. The worst thing that can happen to a lithium-ion battery is to have a full charge and be subjected to elevated temperatures. So don't leave or charge your mobile device's battery in your car if it's hot out. Heat is by far the largest factor when it comes to reducing lithium-ion battery life.

2: Think about getting a high-capacity lithium-ion battery, rather than carrying a spare

Batteries deteriorate over time, whether they're being used or not. So a spare battery won't last much longer than the one in use. It's important to remember the aging characteristic when purchasing batteries. Make sure to ask for ones with the most recent manufacturing date.

3: Allow partial discharges and avoid full ones (usually)

Unlike NiCad batteries, lithium-ion batteries do not have a charge memory. That means deep-discharge cycles are not required. In fact, it's better for the battery to use partial-discharge cycles.

There is one exception. Battery experts suggest that after 30 charges, you should allow lithium-ion batteries to almost completely discharge. Continuous partial discharges create a condition called digital memory, decreasing the accuracy of the device's power gauge. So let the Makita power tool battery discharge to the cut-off point and then recharge. The power gauge will be recalibrated.

4: Avoid completely discharging lithium-ion batteries

If a lithium-ion battery is discharged below 2.5 volts per cell, a safety circuit built into the battery opens and the battery appears to be dead. The original charger will be of no use. Only battery analyzers with the boost function have a chance of recharging the battery.

Also, for safety reasons, do not recharge deeply discharged lithium-ion batteries if they have been stored in that condition for several months.

5: For extended storage, discharge a lithium-ion battery to about 40 percent and store it in a cool place

I've always had an extra battery for my notebook, but it would never last as long as the original battery. I know now that it's because I was storing the battery fully charged. That means oxidation of lithium-ion is at its highest rate. Storing lithium-ion batteries at 40 percent discharge and in the refrigerator (not freezer) is recommended
Final thoughts

Lithium-ion Dewalt power tool batteries are a huge improvement over previous types of batteries. Getting 500 charge/discharge cycles from a lithium-ion battery is not unheard of. Just follow the above guidelines.

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December 18 2016 1 18 /12 /December /2016 10:30

Rechargeable cordless tools are convenient, portable, and ready to work at a moment’s notice. Cordless tool batteries last for several years; and with proper care and storage, you can extend battery life and your investment.

Here are some dos and don’ts to help you get the most out of the batteries on cordless tools.

Rechargeable Tool Battery Dos

Do Keep Battery Charged:
Recharge Dewalt cordless drill batteries as soon as you notice a decrease in power. Most batteries last longest if recharged when they reach 70% capacity. Even NiCd batteries (the ones with the so-called “memory effect”) only need to be completely discharged every month or so to retain their charge memory.

Do Use Battery Regularly: Battery life decreases with lack of use, so keep those tools in action! If you only very rarely use a tool, you may want to consider a plug-in version, or plan to recharge the cordless tool battery before starting a project.

Do Charge Battery Completely: Be sure to leave the cordless tool battery plugged in until it’s completely charged. Most chargers have an indicator to let you know when the battery is fully charged.

Do Keep Battery Cool and Dry: Cordless tool batteries will last longer if stored in a dry, climate controlled dry area. It’s not necessary, however, to store batteries in the freezer.

Do Store Battery Properly:
Store your Makita cordless tool battery in the original carrying case, or in a cushioned bag. Be sure to use the plastic cap that came with your battery to keep it from short circuiting and to protect the terminals from breakage or moisture.

Do Have a Backup Battery Handy: It’s a good idea to have a second battery available and charged for your cordless tool, so you can switch out in mid-job.

Do Protect the Battery: Be gentle with cordless tool batteries – they won’t work if damaged or cracked.

Do Adjust Cordless Tool Settings: Be sure to use the right tool setting for the job. For example, higher torque settings can run down a cordless drill battery faster, so you’ll get more battery life if you use the setting that’s needed.

Rechargeable Tool Battery Don’ts

Don’t Run Battery All the Way Down: Deep draining (letting a rechargeable battery run all the way down), can permanently damage the poles and shorten battery life. Instead, recharge the battery as soon as your tool starts to slow down. Never deep drain unless you have a NiCd battery that’s showing decreased capacity due to the memory effect.

Don’t Leave Battery on Charger:
Unless your tool instructions specifically say to store the battery on the charger, be sure to remove it after charging is complete. Overcharging can damage a battery and shorten its life, and not all chargers shut off automatically.

Don’t Overheat Battery: Heat is deadly to rechargeable batteries and can even cause them to explode. If the battery gets hot to the touch, let it cool down before recharging or using. Don’t store rechargeable batteries in a hot car, attic, or overheated storage area.
Don’t Get Battery Wet: Don’t expose your cordless (or corded) tools or batteries to water. Immediately wipe away any moisture on the tool or Bosch power tool battery.



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