(1), the laptop battery undervoltage into the undervoltage protection state, the FET is not activated lead to the battery data transfer failed - no communication. At present, except some Toshiba battery communication protocol, the other batteries have a communication protocol, the communication is related to whether the battery information can be recognized by the computer.
(2), the battery into other protection state, the flag set the battery into the protection state, in which case the battery charge and discharge FET will be turned off, the battery was no output and input state led to the computer can not detect the battery .
(3) The ID pin of the battery output terminal pin definition and the computer is open (usually oxidation or poor contact). Many users of notebook batteries have certainly been available before, but the battery is not detected usually are the reasons for these aspects.
(4), for under-voltage protection of the laptop battery, if conditions allow it can be loaded at both ends of the battery forward current -100mA or less (at least you have to know that the end is the positive and negative).
(5), for no output and input laptop battery state, then go back to repair it, the software flag bit set or hardware off professionals need to be resolved, because of the higher difficulty factor, it is very troublesome to deal with them .
(6), the battery output terminal oxidation or poor contact, you can use a small blade with a shaving surface gently polish the battery plug hardware and computer contacts, after the completion of the battery can be restored. .
Laptop battery how to carry out maintenance
(1) When charging for the first time, you should charge the battery continuously to full (typically above 12 hours) and make 3 commisions to completely wake up the new battery.
(2), if prolonged use of external power supply, it is best to remove the battery. Many of my friends did not notice this problem, do not remove the battery with an external power supply not only affect the battery life, but also let the laptop's cooling burden becomes heavier, shorten the battery life.
(3), regular charge and discharge. Even if there is no memory effect of lithium-ion battery there is a certain inertia effect, if not used for a long time will make lithium-ion inactive, you need to re-activate. Therefore, if you do not use the computer for a long time or found that the laptop battery charge and discharge time is shorter, should be done 2-3 times running, usually at least once a month.
(4), it is best to turn off the laptop when charging, so that the laptop battery can be fully charged, do not unplug the power in the middle of charging. Power-off charging than the boot charging shorten the charging time of more than 30%, but also to extend the battery life. It is best to recharge after 30 minutes before use.
(5), lithium-ion battery charge and discharge times generally not more than 1000 times, each time a charge, it will shorten the life time. It is recommended that you use an external power supply, if you need to use the middle of the plug and unplug the power supply and laptop built-in battery is not unplugged, will make the laptop battery off life is very large, because each external power access is equivalent to the laptop battery charge once.
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