Q: Why the standby time of thinkpad battery is getting short?
A: The battery life is calculated according to the number of charge cycles, with the increase of the number of charge cycles, the fully charged power of battery will gradually reduce, when the number of charge cycles reach about 300, the fully charged power of battery will be drastically reduced.

Q: Why the running time is not as long as the standby time marked at the description?
A: The running time is based on the current running watts of the computer which decided by the expressions: Running time = fully charged battery / computer running Watts.

Thinkpad t20 series battery

Q: How to low down the running watts of thinkpad computers to extend running time?
A: Using “The Longest Battery Life” power management solution in the power management devices, close the wireless LAN and Bluetooth, and try not to use external USB devices or other equipment, do not use CPU intensive calculation procedures and operations.

Q: Thinkpad battery cannot be 100% charged.
A: The battery power is higher than the designed capacity when the new battery is fully charged, if stop charging when the battery is charged the designed capacity, the battery is not fully charged and it shows that it’s not 100% charged. With the number of charge cycles accumulated the fully charged power will gradually decrease, and then it display the battery is 100% charged.

Q: When unplugging thinkpad adapter, and found the screen darkened, FN + Pgup and PgDn to adjust the brightness, the brightness can not be saved after restart the computer.
A: The default power management solution is optimize the power supply, the computer is in a low-power mode when unplug the adapter, the screen brightness will be reduced. If you want to define a screen brightness level, create a new power management program in the power management device, then you could choose the right screen brightness when using the battery or using the adapter.

Q: Why the battery power is still decrease although the adapter is being used?
A: self-discharge is the nomal phenomenon of rechargeable battery.

Q: How to preserve a battery when I don’t need it in a long time?Answer: If in a long time you do not need the battery, you can have this battery be charged to 60%, and then put it in a plastic bag and put it in a cool addition to make it a good save. Every six months it should be discharged and charged.

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