Rechargeable battery basics

We really do not know ah battery, it is necessary for everyone to make up classes. NiMH batteries have 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, and even used on each charge will not impact too much play. Therefore, use nickel-metal hydride batteries, generally can not consider the discharge and direct charge.
    Of course, from the perspective of long life, about 30-50 times the charge and discharge, can do a deep discharge, in order to restore to the maximum capacity. AUDIOPHONE said discharge is not as simple, then a small light bulb, until you can not light. This would tend to over-discharge, but damage the battery.
    We all know that a nickel-metal hydride HP EliteBook 2530p battery voltage is 1.2V, when fully charged in just more than the actual value, generally between 1.4-1.5V. With use, the voltage will gradually reduce, in general, the use of occasions, when the voltage is below 1V, you basically can not be used, such as WALKMAN, CD DISKMAN, MD, MP3, DC, and so on. You can test "run out of power," the battery voltage is.
    However, if the occasion is a low voltage, low current will continue to discharge. We are talking generally refers to the depth of discharge voltage down to 0.85V-0.9V between. By low voltage, low current discharge, to achieve this value, the nickel-metal hydride batteries (including nickel-cadmium) can be restored to the maximum capacity and prolong life. But if it continues to discharge below 0.8V once may result in irreversible damage to the battery, but battery life is affected. This is why the method is not recommended AUDIOPHONE reason, because you can not control the voltage to a certain value will automatically stop. Similarly, nickel-cadmium batteries and nickel-metal hydride batteries are not recommended for the remote control like a small electrical current.
    Depth of discharge of the battery better way is to buy the TOSHIBA PA3399U-1BAS battery charger with discharge function or specialized discharger. The easiest way is to use AUDIOPHONE way, but be sure to read the voltage value table is often used, once the danger zone to stop. If it is connected in series, then simply multiplied by the battery voltage is above the number on it.
    And then the battery is not about long-term preservation and restoration methods. Note that, because the nickel-cadmium batteries and nickel-metal hydride battery characteristics are different, so different preservation methods leaves. Nickel-cadmium hp laptop batteries is to run out of power to save, so we bought before the new nickel-cadmium battery is basically no electricity, you need to reset their own. In general, use the correct charging method takes about 3-5 times to charge and discharge the battery back to its best. The nickel-metal hydride batteries to long-term preservation, it should be charged to 80% (this we all should be counted), then save. This is why now buy the new nickel-metal hydride batteries came back somewhat because of electricity, because the manufacturers have pre-charge, to prevent the transport cycle time is too long, while the battery is affected. Long-term preservation of the nickel-metal hydride battery, when I run out of power first, then the right way to charge 2-3 times can be restored to the best state. (After dinner, continue! Oh)
    Let me say on the issue of IBM ThinkPad T43 battery charging. In fact, the most difficult to master is the correct charge. Points from the charging current to charge, fast charge and trickle charge a difference. From the charging point of view, there is constant current charge and pulse charge the difference. Many people have this problem, what is a good fast charge or slow charge is good.
    Then we take a look at what is fast filling and slow filling what is. Battery with a nominal capacity of 1C, the 0.1-0.2C charging current of the slow charge,> 0.2C for quick charge,> 0.8C for ultra-fast charging, <= 0.05C of the trickle charge is . With a 1400MAH Ni-MH batteries, for example, the charge current between the 140MA-280MA is a slow charger, and the same 280MA charging current of a battery is 700MAH is fast charge. Thus, the fast charge or slow charge is a relative concept, and the capacity of the battery itself has great relevance.
    Return to the previous question, what is a good fast or slow is good? ! In fact, this is no fixed answer. Many people think that slow is good, that will hurt the fast-charge batteries. What will hurt the battery fast charge? The answer is yes, but not because a lot of people think the "high current charging damage the battery." Large current is at best an accomplice, the real reason is heat, because heat caused by high current. High temperature on battery life have a great impact. So high current is not terrible, headache is how to solve the heat problem.
    Here, it is necessary to introduce constant current HP Pavilion DV8000 Battery charging and pulse charging concept. In the slow charge, it is basically all the chargers are constant current charging method used, so that the circuit design is simple, easy to implement. And because the charge current in the slow range, and will not cause the battery overheating. Fast current charge to use the issue, then use the constant current mode, no doubt unable to avoid battery overheating problem, so the constant current method was abandoned. Instead, the pulse mode, can be seen from the waveform, the output charge current 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 Toshiba battery to have a recovery time, thus reducing the heat generated by high current, battery heat control at an acceptable level. Now see the hundreds of dollars on the market about the rapid charger, basically using this method. And such a voltage charger is also used to determine slope or delta method to determine the method to determine whether the battery is full, once full turn on automatically trickle charge to avoid a large current over time damage the battery. Relatively well-known example is the recommendation of friends who each fresh cow KN5060 charger. The Chargers are in the major electronic markets, which can be between the 65-70 win, work is not very sophisticated, but the results are good, are highly cost-effective products.
    Pulse mode to produce fast HP Pavilion dv4 Battery charger is a good solution, but for some abnormal demands, such as 1 hour quick charger, this time to adopt ultra-high speed greater than 1C charging current for charging, pulse method on insufficient. Is now used internationally are basically added depolarization pulse method as the way. Simply put, that is based on the pulse method, when the upper half of a sine wave is completed, insert a short negative voltage of the cosine wave, the current is too large to offset the enormous heat (polarization response) to the battery heat under control. This method is generally only in the more specialized chargers, such as model aircraft used by professional players on the charger used. Such chargers are often used 2C-3C can be done on the battery charge current.
    That these methods, from the perspective of battery life, slow constant current charging is undoubtedly the best way to ensure that the APPLE Laptop Battery replacement life. But from the perspective of time is money, fast charger time savings benefits, damage battery life than the loss of about 10% larger. This is why fast chargers are popular.
    Finally, talk about the chewing gum batteries. Many MP3 players say the MD player, you do not to use chewing gum batteries, or how the two of us playing time will be so much worse.
    This concept is wrong, the battery is the battery of a chewing gum form, the essence is still the nickel-metal hydride batteries. In other words, a gum 1350MAH 1350MAH battery and a battery of Ni-MH playback is the same, no difference. In fact Ni-MH HP ProBook 6540b Battery  have been a 1800MAH capacity, far more than chewing gum batteries. Gum battery production, is to do as far as possible the thin Walkman devices, 5 thin battery specifications do not, and 7, the battery capacity and platform size is small, so small in Japan came up with this approach, not because gum battery capacity is particularly great. And chewing gum are also nickel-metal hydride battery in nickel-cadmium and the difference between the early nickel-cadmium batteries, but chewing gum is only 600MAH, not the current nickel-metal hydride battery 750MAH 7 large.