The battery on my ThinkPad T410 only lasted for one year. Now, when "fully charged", it will only power the computer for less than 20 minutes.
The battery is the Lenovo 55++, which is a 94 Wh, 9-cell Lithium-ion battery. I use the computer every day, almost always connected to AC power. When I am not using the computer (for instance while traveling from home to work), it is in standby mode.
I run Ubuntu linux 10.04.2.
This seems like a very short lifetime for a battery (1 year), which leads me to ask:
- Is this normal?
- Is the battery broken?
- Or am I doing it wrong? i.e. is there something I should be doing to prolong the battery life? Is keeping the computer plugged into AC power when available not a good thing to do? Is there a problem with Linux's power management? etc.
What is the best way to maximize total battery longevity?