01-28-2013 07:15 AM
I recently purchased a Lenovo U410 and whilst looking through the pre-installed software found the Energy Management program and saw within it a "Battery Guage Reset" function.
What does this do, and when should it be used?
I've also noticed, that the amount time I have between having to re-charge the battery seems to be getting shorter - I'm not sure if that's just psychological, or it's because I'm doing more with it, or it really is getting shorter, and I didn't note the amount of time Windows reported the battery would last when I first got it, but now, after about 3 weeks of non-intensive use, the Windows battery guage reports it will last about 3hrs when fully charged.
I did have it on a High Performance based power plan for a while, to see what difference that made to performance, but have dropped back to Balanced now as it had little effect.
Is 3hrs remaining when fully charged normal?
May having the power plan set to High performance have skewed Windows remaining time information?
Will the Battery Gauge Reset function help?
Is there something else (aside from using it less) that may help?
And whilst I understand it's only "up to", 3hrs seems awfully short for something that's advertised has having "up to 9hrs" battery time.
01-28-2013 07:20 AM - edited 01-28-2013 07:28 AM
basicaly when you are running on battery, and windows battery time remaning says you have 30mins or more time left and your notebook suddely turns off, this means the battery gauge needs to be recalibrated, and the battery rest will do this, giving you are more accurate time remaning estimation.
But only do it every 3-6 months
EDIT : A battery reset can take many hours to complete and it can appear to have frozen, but just leave it till it`s finished.
01-28-2013 12:01 PM - edited 01-28-2013 12:03 PM
Sorry but i dont know the system specs of the Lenovo U410 or how you have been using it, but 3-5 hours is what you get from most notebooks just browsing the net, normaly take what the lenovo says the battery life and half it, so 8hrs becomes 4hrs.
Install the free version of battery bar, it will learn you battery usage and give better estimates of remaing battery life, it will also show your battery wear level.
01-28-2013 02:01 PM
Hmm... The Battery Bar toolbar doesn't want to work, but I got the floating version working.
The U410 is advertised as having "up to 9hrs" battery time.
I know that's never what you get.
But <4hrs does seem a little low.
01-28-2013 02:15 PM
Yeah, 9hr to 3hr is quite a drop, have you ran the taskmanger to see if any application or system proccess are using a lot of your cpu, also if you have a dedicated gpu, make sure it not enabled all the time.
01-28-2013 02:49 PM
It's got an nVidia GPU as well as the Intel HD graphics, and I did notice that I'd left the nVidia GPU set to be used with all programs the other day, so that may account for some of it (I set it to on to see if it would help with an issue I was having with video playback in the 4OD Windows 8 App, and then forgot to diable it again), but it's now set back to auto-detect and have rebooted, so that shouldn't be the problem.
Regarding stuff running in the background, I've got a few live tiles, and I guess I do tend to leave stuff open in the background instead of closing things, so again maybe that's partly the problem. But, looking in Task Manager, there's not much running most of the time.
Battery bar is saying 5:22 Full runtime at the moment, so that's no too bad, I guess. However I have only just installed it.
01-28-2013 02:53 PM
What is your discharge rate in mW according to battery bar when running on battery?
01-28-2013 03:13 PM - edited 01-28-2013 03:14 PM
It's different amost every time I look at it.
-8295mW just now.
And it just jumped to -12000mW and something, just now, but then I could also hear the HDD being accessed.
Watched it for a while, and it dropped to -7718mW at it's lowest.
Spent most of the time around the low -8000mW mark.
And Full discharge time is up to 5:45.
01-28-2013 08:41 PM
Just played Frozen Synapse...
That drains the battery fast!
Could have something to do with why it's not lasting too long!
Right - note to self: only play FS when on mains power!