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My problem is that even if the battery percentage is 0 the notebook can stay on around an hour. I have disabled "critical battery action" on my operating systems to use more time my notebook. The designed capacity is 66 Wh, the battery currently reports 9 Wh when battery is full.
I tried to fully charge the battery (around 5 hours) and then let the battery drain completely. That increased the full energy value from 3 Wh to 9 Wh.
Is there any way to trully fix the full capacity value of the battery?
I think that the battery's problem occured from my previous faulty power supply.
My notebooks is Dell Inspiron 3521. Operating Systems: Ubuntu 14.04 based & Windows 8.1
Battery Details:
Vendor : Simplo
Model : DELL 4DMNG31N
Energy : 9,2 Wh
Energy When Full : 9,2 Wh
Energy (design): 66,6 Wh
Voltage : 12,2 V
More Info Requested:
The battery is 1.5 years old, the previous battery after a year was dead ("Battery has experienced permanent failure" message at boot) and Dell send me a new one. The power supply some times couldn't charge the notebook and sometimes gave less watt than 90 that my notebook needed (problem with the cable, just received a new one from Dell too) Bios doesn't have any utility for the battery.
1How old is the battery? (They don't last forever) – Ƭᴇcʜιᴇ007 – 2015-02-07T19:14:47.127
1What make and model is the notebook (and its battery, if you can get that information)? Some laptops have a battery-conditioning utility in the BIOS. What was the problem with the previous power supply? – Andrew Morton – 2015-02-07T19:16:53.620
It’s not mWh, by the way. It’s Wh. Otherwise, it would last for an incredible 20s or less. – Daniel B – 2015-02-07T19:18:23.927
@DanielB I was wondering about that too - maybe the design capacity is 6600 mWh but the battery is so wrong about its state that it reports a meagre 9 mWh. OP: should there be some zeros added onto the end of some of your numbers? – Andrew Morton – 2015-02-07T19:30:27.767
The battery is 1.5 years old, the previous battery after a year was dead and Dell send me a new one. The power supply some times couldn't charge the notebook and sometimes gave less watt than 90 that my notebook needed (problem with the cable, just received a new one from Dell too) Bios doesn't have any utility for the battery. I'm going to update the question with more battery and notebook details – George Sofianos – 2015-02-07T20:48:49.087
3Drain the battery completely, I usually do this by booting into the bios and let it run until it shuts down, then charge the battery completely. – Moab – 2015-02-08T00:09:58.363