Battery runtime timer

Is there a program that will start a timer when windows loads and pause the timer when it hibernates or is shuts down?

I'd like a program that will just keep track of how long my laptop lasts on battery power and then I can average the results.

I have an HP and windows only tells me the remaining % of the battery and not the remaining time left.

Hopefully someone knows of a program that can do this so I can have a better estimate of my battery power (should be around 2 hours) left.

[I could use a stopwatch but this would be harder to do.]

 

In the Task Manager, Performance tab, there's "Up Time". I *think* it only counts non-sleep, non-hibernate time... but you may want to test that.

Of course, you can't shut down or reboot or it'll reset... but your times would be off anyway if you shut down or reboot, because any timer program wouldn't be counting the startup/shutdown time, which uses at least as much battery as anything else the computer does.

 

Thanks swarmer, I forgot about the computer uptime feature. It keeps counting when the computer is sleeping or hibernating. It just remembers when the computer was started up and subtracts the current date from that to find the uptime.
Not exactly what I was looking for but the best solution yet.

Command prompt to find uptime: (For XP Pro)

Code:

Systeminfo | Find "Up Time"