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#1
Battery Calculation Error (thinkpad R51)
So, I got this old (2005-ish) laptop that was pretty new, almost unused and put 7 on it.
Before I did, however, I did some benchmarking of the battery. ~3 hours to charge it from nothing, and ~40-45 minutes in the bios before it shut down, dead. Decent enough for a 5 year old battery.
However, it doesn't work that way in windows. Obviously I would not be expecting a full 45 minutes, as windows uses more power then just sitting in the bios, idle.
What would happen is, the LED on the machine shows battery power; steady green at approx 75-100%, and it starts to flash at less then 75, increasing in speed until it dies.
In windows, it seems that from 100% to ~75%, the battery LED is green and windows reports that it gets down to around 75% battery left, then it sends itself into hibernation.
Upon reboot, the battery LED is blinking like it doesn't have any power left, and windows reports 0% battery remaining.
HOWEVER, I can keep the PC running for a good half hour after that, with 0% battery.
Additionally, if I let the battery drain totally, boot into windows, and start recharging it, it charges up to around 25% until it jumps to 100%.. Additionally, the LED turns green.
No idea what is wrong. Windows seems to be interrupting the normal, functional function of the battery LED while not getting correct readings. The battery works, but with windows, it does not.
Ideas? thanks