I have a T410/T410i or T510/T510, and the battery seems to hold less and less of a full charge.
Run times on a full charge seem shorter than anticipated and / or battery full charge capacity levels degrade more quickly than normal, or batteries won't fully charge.
Do I need to replace the battery ? Is it defective?
Before you call service or consider replacing the battery, check to ensure you have the latest firmware on the battery - this is made available through an updated BIOS.
This battery firmware update utility fixes an issue where some batteries indicate an incorrect full charge capacity value. Because of this error, the amount of energy available for use is artificially low, decreasing the amount of time the system can be used on battery. The fix is entirely contained in the battery firmware update; there is no need to replace any hardware for this problem.
The formal tip above has been updated to include provisions for a small number of batteries with FRU 42T4797 that contained firmware that would not accept the original update released in Sept 2010. Customers with these batteries could have seen a error like the one illustrated below while trying to apply the update. The firmware update has been revised and should work properly with these batteries. Please visit the link above and re-run the firmware update if needed.