Arch Linux

jameh0

Member

Registered: 2013-04-06

Posts: 40

Battery capacity 42%

Running upower -d shows:

~ $ upower -d
Device: /org/freedesktop/UPower/devices/battery_BAT0
  native-path:          BAT0
  vendor:               DPONz951NDN5A
  model:                bq20z951NDN5A
  power supply:         yes
  updated:              Wed 26 Mar 2014 01:47:55 PM EDT (11 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               discharging
    energy:              39.66 Wh
    energy-empty:        0 Wh
    energy-full:         54.38 Wh
    energy-full-design:  130 Wh
    energy-rate:         26.07 W
    voltage:             7.572 V
    time to empty:       1.5 hours
    percentage:          72%
    capacity:            41.8308%
  History (charge):
    1395856075  72.000  discharging
    1395856045  73.000  discharging
    1395855985  74.000  discharging
  History (rate):
    1395856075  26.070  discharging
    1395856045  26.370  discharging
    1395856015  28.927  discharging
    1395855985  26.734  discharging

Device: /org/freedesktop/UPower/devices/line_power_ADP1
  native-path:          ADP1
  power supply:         yes
  updated:              Wed 26 Mar 2014 01:34:20 PM EDT (826 seconds ago)
  has history:          no
  has statistics:       no
  line-power
    online:             no

Daemon:
  daemon-version:  0.9.23
  on-battery:      yes
  on-low-battery:  no
  lid-is-closed:   no
  lid-is-present:  yes
  is-docked:       no

But my battery seems to be working fine...

I recently installed KDE

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Life is very short, and there's no time for fussing and fighting, my friends.

\hbar

Member

Registered: 2014-03-15

Posts: 165

Re: Battery capacity 42%

According to this the design full capacity of your battery is 130 Wh, and its current full capacity is 54.38 Wh. 130 Wh seems like a lot to me, perhaps that's wrong, in which case your battery would be fine, the readings about your battery as well, it'd just be the design full capacity that is not read correctly by upower in your case.

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,659

Re: Battery capacity 42%

How old is the battery?  Based upon those numbers, I am guessing about four years.  Maybe five.
The battery looks to have seen its share of charge cycles and is nearing the end of its design life.  Li-Poly batteries usually are rated for about 300 cycles. Li-Ion are about the same  At that point, the battery probably holds about 50% of its rated capacity.  They degrade quickly after this point.  Sorry. 

If it is a new battery, then you have a different issue

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Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
The shortest way to ruin a country is to give power to demagogues.— Dionysius of Halicarnassus
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jameh0

Member

Registered: 2013-04-06

Posts: 40

Re: Battery capacity 42%

According to the specs of my battery, it has a capacity of 95Wh, so @\hbar, you are right that 130Wh is high.

@ewaller, your guess was spot on. It's the original battery from a Mid-2009 Macbook Pro 17" (built in Jan 2010, bought shortly thereafter) Lithium Polymer.

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Life is very short, and there's no time for fussing and fighting, my friends.