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Posts: 16
Registered: ‎06-07-2011
Location: Israel
Message 11 of 20 (2,096 Views)

Re: Battery life on T520

OK, I did a full system update.

Battery is now 99% full, and according to the meter I have ~6:45 hours left.

However, the numbers in the meter are not consistent - it's changes all the time. It goes to 6:59, the 6:15, 6:30, 6:43, 6:17 etc.

Now (as I type this reply) it became 7:19.

 

Is that the normal behavior of the meter? Should it take so long before it shows the actual time left?

Guru
Posts: 9,240
Registered: ‎12-26-2009
Location: Toronto, Canada
Message 12 of 20 (2,095 Views)

Re: Battery life on T520

The meter generally fluctuates based on how you're using it.

It still looks below normal though...

Get the tool linked here:
http://forums.laptopvideo2go.com/topic/26992-optimus-test-tools-finally-in-users-hands/

See if the NVidia card is always on or something.

(You didn't disable Optimus in BIOS, did you?)
W520: 2720QM, Q2000M at 1082/1376, 32GB RAM, 500GB + 750GB HDD, FHD screen & MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 160GB HDD, WXGA+ screen
TPT1: 1839-23U
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Posts: 16
Registered: ‎06-07-2011
Location: Israel
Message 13 of 20 (2,094 Views)

Re: Battery life on T520

OK, I ran the tools, and they state my GPU is OFF.

I'm not sure what optimus is, and how can I disable it in the bios... Is it something that can enhance battry time?

Guru
Posts: 9,240
Registered: ‎12-26-2009
Location: Toronto, Canada
Message 14 of 20 (2,092 Views)

Re: Battery life on T520

This is certainly bizarre.

What task resident programs do you have? Go to Task Manager's Processes tab and (show processes from all users if the button exists) list the contents. Also look for anything (other than System Idle Process) that is using CPU.

Since the tools report the GPU as being off anyway, then disabling Optimus should have no effect.
W520: 2720QM, Q2000M at 1082/1376, 32GB RAM, 500GB + 750GB HDD, FHD screen & MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 160GB HDD, WXGA+ screen
TPT1: 1839-23U
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Posts: 16
Registered: ‎06-07-2011
Location: Israel
Message 15 of 20 (2,087 Views)

Re: Battery life on T520

OK, this is getting strange...

After some fiddling around with the battery settings, the green settings (those of Lenovo) displays 9:07 hrs, while Windows settings (the grey, little battery) displays 12:08 hours remaining.

 

Which one should I believe?

Blue Screen Again
Posts: 6
Registered: ‎06-08-2011
Location: Germany
Message 16 of 20 (2,086 Views)

Re: Battery life on T520

Hi all, 

 

please check my thread (background programs have a strong impact on battery life): 

http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T520-Bad-battery-life-hardware-issue/td-p/4...

 

Atb, Tobias

Guru
Posts: 9,240
Registered: ‎12-26-2009
Location: Toronto, Canada
Message 17 of 20 (2,083 Views)

Re: Battery life on T520

Generally, after a while of consistent usage, the two meters will roughly agree with each other.

Skype and Chrome are two major battery life eaters. You should consider alternate software or avoiding them while on battery power.
W520: 2720QM, Q2000M at 1082/1376, 32GB RAM, 500GB + 750GB HDD, FHD screen & MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 160GB HDD, WXGA+ screen
TPT1: 1839-23U
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Posts: 16
Registered: ‎06-07-2011
Location: Israel
Message 18 of 20 (2,074 Views)

Re: Battery life on T520

Thanks, it now looks good.

I'll keep in mind what you wrote about battery intensive programs.

Tobias - thanks for your input too.

What's DOS?
Posts: 2
Registered: ‎02-10-2014
Location: Bulgaria
Message 19 of 20 (689 Views)

Re: Battery life on T520

Hi, guys!
Is there a place to look for how many recharge cycles has my 6 cell battery? Thanks! Smiley Happy

802.11n
Posts: 204
Registered: ‎12-31-2013
Location: US
Message 20 of 20 (678 Views)

Re: Battery life on T520

ColonelONeill >> A new Lenovo battery should be properly calibrated...

--------------------------------------------------------------------------------

Good one.  Is that a joke?  Because they almost never are, maybe 20% of the ones I receive.

 


W530 | 3840QM | 32g @ 1.35v CL9 1986z | 512g 840 Pro | 1t HGST 7200 | FHD AUO v.4 | Quadro K2k | GOBI 5k | Centrino 6300
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