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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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December 2 2016 6 02 /12 /December /2016 13:45

DeWalt is a line of construction supply tools. One of the many innovative machines created by the engineers of DeWalt is the DeWalt DE0241 battery drill or cordless drill. The DeWalt cordless battery drill has changeable bits and chucks, making it a versatile tool that can be used in different areas of construction. You can switch the chucks and bits based on the particular construction job you are performing, such as drilling a hole on the wall or tightening a screw into place.

Switch the setting of the drill's clutch and reduce it to the lowest range possible.

Open the chuck jaw as wide as you can and use a screwdriver to remove the screw that secures the chuck. Turn the screwdriver clockwise to loosen the Dewalt DE0242 battery.

Secure the end of a 1/4-inch or larger hex Allen wrench into the chuck. Strike the long end of the wrench counterclockwise with a hammer. This will loosen the old chuck and you can easily take it out.

Insert the new chuck where the old chuck was positioned. Turn the chuck counterclockwise until it is secured tightly in place (with a "keyless" chuck, you can hand-tighten the bit into place without using a chuck key).

Put back the screw that holds the chuck in place and tighten it well for Dewalt DE0243 battery.

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November 30 2016 4 30 /11 /November /2016 09:30

No. Just the opposite. You should stop using a battery as soon as you feel a substantial decrease in power from the tool. Completely running down a battery may damage it. Do not tape the trigger to run down the battery.

Memory is one of many conditions which causes a loss of run-time. Memory is created from repetitive light use in the exact same application (i.e. Cordless Phones, Video Cameras, Electric Shavers, etc.) Our products rarely see light use or the exact same loads, due to variability from the user, the accessory size, as well as the material. The same variability which causes different run-times prevents our cells from developing memory. Power tools are considered high-drain applications. Memory typically develops in lower-drain rate applications, such as cordless phones, laptops, etc…, because the rate at which the battery is draining is continuously the same. Power tools draw higher currents and have sporadic drain rates minimizing the opportunity for the battery to develop a memory.

No. The DEWALT chargers have a maintenance mode which allows batteries to remain in the charger, maintaining a fully charged pack until the user is ready to work. If DEWALT NiCd batteries are stored outside of the charger, they will discharge naturally, 15-20% the first 24 hours, 7-10% the next day, and about 1% every day there after. NiCd batteries lose the bulk of the capacity when outside of the charger in the first 3 days. In fact, it is better for the battery to leave it in the charger to be sure it goes through Equalization and Maintenance Modes. One of the benefits of DEWALT XRP™ Lithium Ion batteries is that they have limited self discharge. Storing DEWALT Lithium Ion batteries outside of the charger will not result in loss of charge. Learn more about brushless tools technology.

If no permanent damage has been done to your battery, you may be able to improve its run-time.The correct procedure for charging your batteries is as follows:
1. Discharge the battery under normal use. Remove the battery, once you feel a loss of power from the tool. Do not tape the trigger ON.
2. Let the battery sit out of the charger for a least 2 hours until the battery is at room temperature.
3. Place the battery in the charger overnight to allow for a full charge on each individual cell (A minimum of 8 hours at room temperature).
If there is no difference in run-time, there is either permanent damage or the battery has reached the end of its usable life. In either case, the battery should be replaced.

Yes. If the batteries are too hot (105°F or higher) or too cold (below 40°F), the batteries will not take a full charge. Attempting to charge batteries outside the 40°F-105°F range can result in a permanent loss of run-time. When batteries are being charged and discharged, a chemical reaction is taking place, and if it is too hot or cold the chemical reaction is disturbed causing a loss of run-time.

Yes. All DEWALT chargers, excluding the DW9106, have been designed to handle the variations in voltage and current delivered by generators.

Transporting batteries can possibly cause fires if the battery terminals inadvertently come in contact with conductive materials such as keys, coins, hand tools and the like. The U.S. Department of Transportation Hazardous Material Regulations (HMR) actually prohibit transporting batteries in commerce or on airplanes (i.e. packed in suitcases and carryon luggage) UNLESS they are properly protected from short circuits.So anytime you transport individual batteries, make sure that the Dewalt DCB121 battery terminals are protected and well insulated from materials that could contact them and cause a short circuit. For more information consult the U.S. DOT website.

RECYCLE THEM. DEWALT is an active participant with RBRC (Rechargeable Battery Recycling Corporation), the organization which is the international leader in the collection, transportation and recycling of NiCd cells. Old batteries should be disposed of at DEWALT Service Centers.

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November 29 2016 3 29 /11 /November /2016 15:22

Like all rechargeable laptop battery packs, laptop batteries eventually lose their ability to hold a full charge. Although it's not possible to make a battery pack perform like new again (unless the cells are replaced), it is possible to improve cell performance by reconditioning or calibrating some laptop battery packs.

Insert the battery into the laptop. Plug in the laptop and allow the battery to fully charge. Restart the computer.

Disable hibernation temporarily. In Windows XP, for example, click Start, then "Control Panel," then "Power Options." Select the "Hibernate" tab, then uncheck "Enable Hibernation." Click "OK" to save the settings.

Change settings to discharge the battery. Click on "Control Panel," "Performance and Maintenance," "Power Options" and then "Power Schemes." Make a note of the settings under the "Plugged In" and "Running on Batteries" columns so you can reset them later.

Set all six options to "Never" from the drop-down lists. Click "OK" to save the settings and disable power management.

Unplug the laptop, but do not turn it off. Run the laptop until the Fujitsu notebook battery is completely discharged (the Power/Standby light will blink) and the laptop shuts down.

Plug the laptop back in, allow it to fully charge again, then restart the computer. Enable hibernation and enter your original performance settings in "Power Schemes."

The battery pack will charge faster if you are not using the laptop. Turn the computer off for best results. Also, clean the metal contacts on the battery with a soft cloth to improve power transfer.

Do not calibrate lithium-ion Samsung notebook batteries. Other types of laptop batteries, such as NiMH and NiCad, should not be calibrated more than once a month to avoid damage to the circuitry.

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November 20 2016 1 20 /11 /November /2016 10:40

Many people know that lithium is used to control bipolar disorder (manic-depressive illness), but researchers are only now beginning to uncover how exactly lithium affects the brain. For more than years, individuals with bipolar disorder have been taking lithium Acer laptop battery. Research has now led to the possibility that lithium can also help to reduce the effects of Alzheimer's disease. Although many of the studies on lithium have been conducted on the brains of rats, scientists believe that the results of the studies may be able to be applied to humans as well.

Protection Against Brain Cell Death

As people age, their neurons, or brain cells, naturally begin to die off. A study published in Neuropharmacology proved that lithium prevents neuronal death in rats. It accomplished this by causing the body to produce BDNF (brain-derived neurotrophic factor), a protein that helps to maintain and develop neurons. Researchers believe that this effect of lithium Lenovo laptop battery may hold true in humans as well.

Stimulation of Neural Growth

Until the 1990s, people believed that adult human brains could not stimulate the growth of brand new neurons. After learning further about the brain, we understand that adult brains can and do produce new neurons, albeit less so than infant brains do. A study in the Journal of Neurochemistry found that lithium actually promotes this neural growth in rats by 25 percent.

Increase in Gray Matter

Gray matter is an important part of the brain that is responsible for logical thought. Researchers at the Wayne State University School of Medicine did a study concerning ten people with bipolar disorder who were given lithium at a theraputic level. They examined MRIs of the subjects' brains after the lithium was administered, and they discovered that the gray matter increased by an average of 3 percent.

Spatial Memory

In common lingo, spatial memory is known as "sense of direction." Although little research has been conducted to show the link between lithium and spatial memory, the limited studies show that rats were able to navigate a maze within 24 hours of being exposed to lithium Asus laptop battery.

Prevention of Alzheimer's

Because of the reasons above, it is logical to assume that lithium could be helpful in combating Alzheimer's disease. There is, however, another effect that lithium has on the brain that could be even more helpful. Lithium has been shown to inhibit two of the three most characteristic features of Alzheimer's: amyloid-beta plaques and neurofibrillary tangles. The third character feature of Alzheimer's? Neural death.


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November 13 2016 1 13 /11 /November /2016 20:39

Rechargeable NiMH (nickel-metal hydride) Bosch cordless drill batteries are a necessity for power-hungry devices such as digital cameras, which can quickly drain conventional alkaline batteries. However, whereas alkaline batteries require little maintenance, NiMH batteries do need special care to not only extend their lifetime, but also to avoid potential dangers.

Remove NiMH batteries from the drill charger if you don't plan on using them for more than a month.

Do not drop the batteries onto hard surfaces, as this behavior could expose the corrosive materials inside the battery case.

Do not attempt to incinerate NiMH batteries or expose them to excessive heat. Batteries can explode if you toss them in a fire or place them near other extreme heat sources.

Fully charge your NiMH batteries and do not charge them again until you fully drain them. An occurrence known as the "memory effect" can prevent rechargeable batteries from fully charging if you don't regularly drain the batteries before charging them. Buy more than one set of NiMH batteries so that you have a charged set ready to go when your in-use set drains.

Clean the contacts on each end of your NiMH batteries with cotton (or a cotton swab) and isopropyl alcohol. Keeping the contacts clean ensures the batteries charge as quickly as possible.

Break in batteries by charging and draining them up to three times before use. This helps batteries run at peak performance and capacity and is useful not only for new power tool batteries, but for batteries you place in storage.


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October 9 2016 1 09 /10 /October /2016 10:12

A nickel-metal hydride power tool battery, also known as NiMH, is a secondary cell.They are used in cameras and other electronic devices. They are widely used Because it’s cheap and has a flow rate capacity of the cells to be used as required. Can replace the generic battery immediately.

Important. Can bring to new charging hundreds to thousands of times. Make savings in the long run. and also help maintain the the environment.

Though we will generally choose to buy battery charger. Which is both fast and slow charging. Based on the budget, there, which is most expensive. We should build it up by yourself, because it’s cheap and good quality.

The project is the NiMH battery charger circuit on automatically shut off when fully charged. Can charge the batteries from 1-10 pcs. Depending on the input voltage.

In circuit has LED indicator are 2 LEDs. By showing the charging status and will be off when the battery is fully charged.
And the LED function indicator that the Paslode drill battery is connected correctly.

For input voltage is supplied to the charger circuit can be used for the power supply ranging from 12-16 volts and use current to charge to 800 milliamperes.

Operation of the circuit.

From the circuit in Figure 1. When connects the battery into both point P3 and P4. There is LED2 will glow In the event of connecting correctly of all battery. If battery reverse polarity, this LED2 go out, We need to check the battery correctly.

Some voltage from the battery is compared to the voltage at IC1-TL072. Which the TL072 is determined to compare the voltage between pin 2 and pin 3.

Figure 1 Automatic ni-mh battery charger using TL072

In case the voltage from battery to charge each cell is still low. The output from pin 1 of IC1-TL072 will send to a transistor Q1, Which acts as switch on-off working to transistor-Q2 so the current can flow to the battery.
And when the circuit is charging there LED1 will show the charging status.

When the battery is full, its the voltage is compared at the IC1, will make an output at pin 1 of IC1 go to stop working of Q1-transistor, then also causes the Q2-transistor stop.

The end of battery charging, and LED1 indicator charging is off, to display that the battery is full enough.

The Amount of current in charging battery of the project is determined at 800mA. By there is R7-resistor is a current limiter as above.

The S1-switch is pushed for starting charging, in the event that the battery correctly. But not available charging so we can push it to recharging again. To test that this Dyson battery has Fully charged.

How to builds this project.

This project have a few components so easy to build. First make the single-sided PCB layout as Figure 2 or can also use easily the Universal PCB Board. Then assemble all parts on the PCB as Figure 3 Which We recommend detailed only because they think you can create your own.

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