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laptop shuts down at little under 50%

S

Sniper82

Lifer
For some reason my laptop shuts down at little under 50% on the battery. I thought maybe windows was reading the percentage wrong and the battery was actually dead. Once the laptop shuts down it won't turn back on till I hook the power adapter to it.

Thing is I took the battery out though when it did it last, and hit the button on the battery to test it and it got like 3 out of 5 bars lit. So the battery must have been reading right.

Any ideas?

BTW it's a Compaq E500 if that matters and the laptop shuts down with no warning. Just turns off like power is lost to it.
 
Check the power management settings (Control Panel-Display-ScreenSavers-Monitor Power). Might be the computer is going into standby or hibernation once it hits 50% battery level (you can change this percentage to anything or just disable it).
 
Also possible that your power meter just isn't calibrated correctly.

I believe you would drain the battery completely, then recharge it (which I think you've already done), so I would second what morkman100 said.
 
done checked that. It ain't going into standby or hibernation because nothing I do brings it back on. Guessing something in it might be faulty. Seems like it just loses power and for some strange reason it does it at around 50%.
 
Originally posted by: mshan
Also possible that your power meter just isn't calibrated correctly.

I believe you would drain the battery completely, then recharge it (which I think you've already done), so I would second what morkman100 said.
Click to expand...

I haven't tried that. Whats the best way to drain the battery if the laptop shuts down before it's dead?
 
Normally, you would just use the laptop till the power meter hits a low warning level like 5 - 10 % remaining.

Then you would just recharge the laptop completely and it should be calibrated correctly. Sounds like you have already kinda of done that, though.

Also, does this only happen when you are using battery? Try using the laptop with the AC adapter over extended periods of time to make sure something similar doesn't happen (this way you can hopefully isolate the problem to your battery or something associated with it).
 
just used Compaqs calibration software to calibrate the battery and it didn't help. The laptop still loses power at the same spot. I don't know whatelse to try. Runs all day on the adapter.
 
well the laptop is a few years old and came with it. So that could be the problem. It's just odd that 3 out of 5 lights on the battery show when hitting the test button once the laptop turns off.
 
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