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I'm running ubuntu on my netbook, and I wanted a simple piece of software to keep track of how long the PC manages to stay on while on battery power. It could be something that automatically kicks in when I unplug the ṕower plug. But it could also be a simple command that I run manually to get similar results.

My objective is to find out how long my laptop's battery lasts.

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Keep in mind that power use isn't constant, and will vary depending on how much you use the CPU, hard drive, monitor (turning off when idle and even brightness), etc. – Roger Pate Jun 21 '10 at 2:08
I'm aware of that. I'm just trying to get a general idea. – Bruce Connor Jun 21 '10 at 7:25
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Try acpi on terminal. Here's a friendly tutorial.

check all the status together

acpi -V

Battery 1: discharging, 27%, 00:11:29 remaining
Thermal 1: ok, 50.0 degrees C
AC Adapter 1: off-line
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