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Battery Test?

post #1 of 7
Thread Starter 
I'd like to know how long my battery lasts, but I don't trust windows (when you hover over the battery icon they give you a very sketchy estimate).

I have an SSD, and at times windows will tell me I have 12hours on full charge, 8 hours on full charge, 4 hours at 75% charge, etc.

It seems to be very inaccurate the more charged it is, yet when I have <25% left, it seems to be very accurate.

Is there a program out there I can use to get a accurate estimate for a full charge? Thanks.
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post #2 of 7
Here's three things that make sense to try:
1) Fully charge your battery, then run a moderately power-intensive program at a constant usage (like a GPU or CPU intensive app...folding? ). Try this cycle a few times to see if Windows can "learn" the battery life and time-left information more accurately.

2) Try a 3rd party battery monitor. These were the first few things I found in a Google search:
http://www.mioplanet.com/products/batterymeter/
http://osirisdevelopment.com/BatteryBar/
(I don't think this will help as the monitoring is done by the motherboard and Windows is just accessing what the hardware records (unless M$ is using some goofy algorithm to determine the remaining charge))

3) Benchmark your battery with common programs you use so that you are able to mentally keep track of how much power you have left (from a fully charged state it might take 3 hours to fully discharge--you've used it for 30 minutes so you have roughly 2.5 hours left)
http://www.makeuseof.com/tag/benchma...battery-eater/
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post #3 of 7
^Sorta that.

You need to understand that at 100% charge you could leave your laptop idle and never touch it, and it would last crazy long. Or you could start playing flash games and other stuff and make it last a couple hours.

Point im making is, windows doesnt know your usage pattern until you've put quite a bit of use into your battery. And I dont believe if carries over the information from previous power ons. So windows just makes guesses until it has figured out roughly how much power your going through and then when the battery is almost dead it becomes more accurate.
post #4 of 7
Thread Starter 
Well, I'm just trying to get a good estimate so when I sell it, I'm not cheating people.

I have a netbook, and without an SSD it suppose to run ~11hours. So I'm trying to figure out how much better it is with the SSD.

I feel like having wifi off and the screen dimmed, I can mess around with Word for awhile and wait until there's half a charge left, then just double the estimate it gives.
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post #5 of 7
Quote:
Originally Posted by TheWolfe View Post
Well, I'm just trying to get a good estimate so when I sell it, I'm not cheating people.

I have a netbook, and without an SSD it suppose to run ~11hours. So I'm trying to figure out how much better it is with the SSD.

I feel like having wifi off and the screen dimmed, I can mess around with Word for awhile and wait until there's half a charge left, then just double the estimate it gives.
Just quote the specs from the manufacturer. "Up to xx hours." That way you're not really lying to them.
post #6 of 7
Thread Starter 
Quote:
Originally Posted by s-x View Post
Just quote the specs from the manufacturer. "Up to xx hours." That way you're not really lying to them.
Yeah, I'll probably just say ~11hours+ since netbooks are always claiming 11, and my SSD probably gives it another hour or two.
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post #7 of 7
Try "cmd> powercfg -energy" code to get a list of what you need to do to improve battery life imo.
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The Machine
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Nexus 7 2013
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CPUMotherboardGraphicsRAM
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Hard DriveOptical DriveOSMonitor
Seagate 7200.5 1TB NEC 3540 Dvd-Rom Windows 7 x32 Ultimate Samsung P2350 23" 1080p 
PowerCaseMouseAudio
Seasonic s12-600w CoolerMaster Centurion 5 Logitech G600 Auzen X-Fi Raider 
CPUMotherboardGraphicsRAM
Quad Krait 300 at 1.5Ghz Qualcomm APQ8064-1AA SOC Adreno 320 at 400mhz 2GB DDR3L-1600 
Hard DriveOSMonitorKeyboard
32GB Internal NAND Android 5.0 7" 1920X1200 103% sRGB & 572 cd/m2 LTPS IPS Microsoft Wedge Mobile Keyboard 
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3950mAh/15.01mAh Battery Stereo Speakers 
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