Then again, it might just be a Windows 7 bug.
I didn't think Windows 7 had any bugs?
Acer appears to have found a solution to notebook users' battery life woes. Its Aspire Timeline 1810TZ apparently delivers a 10x improvement in runtime when compared to other thin'n'light laptops equipped with six-cell lithium-ion batteries. After five hours' usage at a day-long conference the other day, we thought we'd check …
I installed windows 7 ultimate on my eee pc 1005ha and it's advertised battery life is 10.5 hours but in windows 7, it says that I have 36 hours remaining at 15% so it is probably a bug. I mean if anythng, should Sony get the most battery life or asus? Acer is just a cheapo computer that delivers pretty much just what you need to do stuff on a computer...
I really hate it when Windows doesn't give you enough notice before the battery runs out. I got the following warning on my Dell, running Vista:
"566hr 05min (12%) remaining"
Yes, 23 days ought to do it!
Shouldn't complain: according to that, when it's charged, my battery should keep going for 6 and a half months.
Batteries will not tell the computer how much runtime is left. They can tell the computer the current power consumption, how much power has been put back into the battery during the last charge, the battery's capacity, and stuff like that. The computer then calculates the runtime from that data. I've seen large numbers like that after coming out of standby, like the other AC mentioned. Fixes itself quickly.
The full-charge-discharge calibration sequence is real - it might take a few months for a battery to reach you - the cells would have self-discharged a little. The battery's chip doesn't account for that, so a full discharge-recharge cycle will recalibrate it.
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To be fair I never said it provided a 'runtime' but since runtime is a very simple calculation of "power remaining / consumption" it's really neither here nor there. Windows is at fault here, it's an issue I've personally never seen with linux (or OSX on the rare occasions I've used it). Even if provided with incorrect values Windows would appear to be failing to apply any sort of sanity checking (par for the course with MS software), it would be more correct to display 'Unknown' than a runtime value which is clearly incorrect.