Rechargeable Battery Knowledge

Ni-MH battery also has memory effect, but no significant nickel-cadmium batteries. The most obvious is the memory effect of lithium batteries.

Memory effect is not obvious means you can charge several times,laptop battery or even every charge there should not be too exhausted to fight on the impact. Therefore, the use of nickel-metal hydride batteries are used, generally without regard to discharge and direct recharge.

Of course, from the perspective of extending life, in the charging and discharging about 30-50 times, you can do a deep discharge, in order to return to maximum capacity.

Discharge is not as simple as AUDIOPHONE said, then a small light bulbs do not shine until you can. Done so often over-discharge, but hurt the battery.

We all know that a nickel-metal hydride battery rated voltage is at 1.2V, the time has just filled with electricity actually exceed the value, generally between 1.4-1.5V. With the use of, the voltage will gradually decrease, in general, the use of occasions, when the voltage drops below 1V, the on basic can not be used, for example, WALKMAN, CD DISKMAN, MD, MP3, DC and so on. You can test your "electric run out" of the battery voltage is.

However, if the use of the occasion is a low-voltage, low current discharge will continue to use. We are talking about generally refers to the depth of discharge voltage drops to between 0.85V-0.9V. Through low-voltage, low current discharge, to achieve this value when the nickel-metal hydride batteries (including Ni-Cd) can be restored to maximum capacity, to extend the service life. However, if it continues to discharge below 0.8V when the battery is likely to result in irreversible damage, but that affect the battery life. This is why the method is not recommended AUDIOPHONE the reason why you can not control voltage to a certain value is automatically stopped. Similarly, nickel-cadmium batteries and nickel-metal hydride batteries are not recommended for remote control device like a small electrical current.

Battery deep discharge better way is to buy a discharge function of a special charger or discharger. The most simple solution is to use AUDIOPHONE approach, but must always use the table read voltage value, once the danger zone stopped immediately.

If it is in series, then simply multiplied by the battery voltage value above the number on it.

Let me now do not have the battery on long-term conservation and restoration methods. IBM Laptop Battery Note that, because the nickel-cadmium batteries and nickel-metal hydride battery characteristics are different, so different preservation methods leaves. Nickel-cadmium batteries is to run out to save electricity,IBM ThinkPad 660 Battery, IBM ThinkPad A20 Battery, so we bought before the new nickel-cadmium batteries is a basic no electricity and need to reset their own. In general, use the correct charging method takes about 3-5 times in order to charge the battery discharge back to top condition. The nickel-metal hydride batteries to long-term preservation, it should be charged to 80% (which we all should be counted), and then save. That is why now buy a new nickel-metal hydride battery power came back somewhat the reason why manufacturers have pre-charge, to prevent the transport cycle time too long, while the battery is affected. Long-term preservation of the nickel-metal hydride batteries, when I first power run out, and then the right way to charge-discharge 2-3 times it can be restored to the best of. (After dinner, and continue to! Hehe)

Let me say on the charging issue. In fact, the most difficult to master is the correct charge.

Charge from the charge current to points, a fast charge and slow charge difference.

From the charging point of view, there is constant current charging and pulse charging the difference.

Many people have asked this question, what is good or slow filling fast charge better.

Then we first take a look at what is too fast or slow charge and what is sufficient.

With a nominal capacity of the battery 1C, the 0.1-0.2C charge current is slow charge,> 0.2C for the fast-charge,> 0.8C for ultra-fast charging, <= 0.05C other hand, is trickle charge . With a 1400MAH Ni-MH battery, for example, the charge current between the 140MA-280MA for the slow charge, while the same 280MA charging current, battery 700MAH for a while is a fast charge. Thus, fast charge or slow charge is a relative concept, and the capacity of the battery itself has great relevance.

And then return to the previous question, what is good or fast slow good? ! In fact there's no fixed answer. Many people think that slow is good, that will hurt the battery charge faster. Fast charge will hurt the battery Mody? The answer is yes, but not because a lot of people think the "high current charging damage the battery." High-current is at best an accomplice,IBM ThinkPad 660 Battery, IBM ThinkPad A20 Battery, the real reason is that fever, due to high current caused by fever. Too high a temperature for a great impact on battery life. So large current is not so terrible headache is how to solve the heating problems.

Here, it is necessary to introduce constant current charging and pulse charging concept. The slow filling, IBM ThinkPad 660 Battery, it is basically all of the chargers have adopted the constant current charging method, this circuit design is relatively simple, easy to implement. And because the charge current in the slow range and do not cause the battery overheating problems. By using fast-charge current issues, re-use constant current mode, no doubt can not avoid the battery overheating issue, so constant of the method was abandoned. Instead, the pulse mode can be seen from the waveform on the charge current output is not linear, but the sine wave. Peak, the current maximum, and then immediately into the trough, almost no current. This design is intended to allow the battery to have a recovery time, thus reducing the heat generated by high current, so that the battery heat control at an acceptable level. Now on the market to see rapid charger hundred yuan basically have adopted this approach. And such charger also used to determine the slope of the voltage delta to determine law or laws to determine whether the battery is full, once filled automatically turn to trickle charge, so as to avoid large current over time damage the battery. Well-known example is the comparison between netizens recommended fresh cattle KN5060 charger. The Chargers are in major electronics market, the basic rooms in the 65-70 win, is not very fine workmanship, but the result was good, belongs to a very high price products.

Pulse mode to produce fast-charger is a good solution, but for some abnormal requirements, such as 1 hour quick charger, this time to adopt the ultra high-speed greater than 1C charge current to carry out charging, pulse method on insufficient. Is now used internationally are basically depolarization pulse method plus an integrated fashion. Simply put, that is, based on the pulse method, when a sine wave in the upper half is completed, insert a short negative voltage of the cosine wave, to offset the excessive large amount of heat generated by the current (depolarization), thus the battery heat under control. This approach generally only in more specialized chargers, such as model aircraft used by the professional players use the charger. Such chargers are often can be done with the 2C-3C of the current on the battery charge time.

Said these methods, from the perspective of battery life, slow constant-current charge is undoubtedly the best way to ensure battery life. However, time is money point of view, rapid charger savings benefits of the time, battery life than the damage the loss of about 10% larger. This is why fast-charger is very popular.

Finally talk about chewing gum battery. Many MP3 players on the MD player that you do not make use of chewing gum batteries do otherwise, IBM ThinkPad A20 Battery, we were both playing time, how can so much worse.

This idea is wrong, chewing gum battery is only a form of battery, in essence, remains a nickel-metal hydride batteries. In other words, a 1350MAH battery and one of the chewing gum on the 5th of 1350MAH Ni-MH battery playback is the same, no difference. In fact 5 nickel-metal hydride batteries have emerged 1800MAH capacity, far more than chewing gum battery. Gum battery production, IBM ThinkPad 660 Battery, IBM ThinkPad A20 Battery,is to do as far as possible the thin Walkman devices, on the 5th battery specifications do not thin, but 7 also sets the battery capacity of the small size, so small Japanese brought up this way, not because the gum battery capacity is particularly great. And the gum where there are nickel-metal hydride batteries and nickel cadmium difference between the early gum nickel-cadmium batteries but only 600MAH, not now on the 7th largest 750MAH Ni-MH battery