I have an old Dell Inspiron 2200 laptop running Windows Vista Home Premium 32bit, and I recently replaced the battery that originally came with it.
The new battery is good, it lasts about 4 hours on a charge, but Vista seems to be reacting to it very strangely. Immediately after I take it off AC power, Vista will alert me that my battery power has reached 99% and is critically low.
After that it'll run fine for about an hour, then when it hits 75% or so it will put itself into sleep mode automatically as if the battery was dead. After it's asleep, I can turn it right back on and it will run for an additional 3 hours before shutting down again (this time because the battery really is dead).
I've tried full-discharging the battery to calibrate it a couple of times, but it made no difference in the behavior. As far as I can tell the battery is fine otherwise (the percentage and time remaining that Vista tells me seem to be accurate), and the computer has no problems when it is plugged in to AC power.
This strange behavior happens exactly the same way every single time I run the computer on battery. Low Battery warning at 99% and false shutdown around 75%. After that it's fine. Any ideas what could be causing this problem?
The new battery is good, it lasts about 4 hours on a charge, but Vista seems to be reacting to it very strangely. Immediately after I take it off AC power, Vista will alert me that my battery power has reached 99% and is critically low.
After that it'll run fine for about an hour, then when it hits 75% or so it will put itself into sleep mode automatically as if the battery was dead. After it's asleep, I can turn it right back on and it will run for an additional 3 hours before shutting down again (this time because the battery really is dead).
I've tried full-discharging the battery to calibrate it a couple of times, but it made no difference in the behavior. As far as I can tell the battery is fine otherwise (the percentage and time remaining that Vista tells me seem to be accurate), and the computer has no problems when it is plugged in to AC power.
This strange behavior happens exactly the same way every single time I run the computer on battery. Low Battery warning at 99% and false shutdown around 75%. After that it's fine. Any ideas what could be causing this problem?
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