1. Download our Official Android App: Forums for Android!

General Nexus 7 Battery Capacity

Discussion in 'Android Devices' started by lvt, Jan 30, 2013.

  1. lvt

    lvt Android Expert
    Thread Starter
    Rank:
     #97
    Points:
    283
    Posts:
    1,541
    Joined:
    Jan 30, 2013

    Jan 30, 2013
    1,541
    550
    283
    Male
    Paris <--> Taipei
    I've read that the Nexus 7 comes with a 4325 mAh battery, I didn't check that information on my Nexus until one or two weeks later, I started checking the battery more frequent after installing a small app called Battery Info, and the maximum capacity of the battery at full charge is 4175 mAh.

    Anyone has a 4325 mAh battery like advertised ?
     

    Advertisement

  2. John Bean

    John Bean Happy Wanderer
    Rank:
    None
    Points:
    163
    Posts:
    1,251
    Joined:
    Jul 28, 2010

    Jul 28, 2010
    1,251
    458
    163
    Male
    Waterfoot, Lancashire
    There's no way that any app can measure the actual capacity of the battery in the same way that the battery manufacturer specifies. I'd say the results you see are pretty close, certainly not enough difference to imply that a smaller battery than specified was used in your Nexus 7.
     
  3. lvt

    lvt Android Expert
    Thread Starter
    Rank:
     #97
    Points:
    283
    Posts:
    1,541
    Joined:
    Jan 30, 2013

    Jan 30, 2013
    1,541
    550
    283
    Male
    Paris <--> Taipei

    Yes, the difference is only about 3.5%, not a big deal, I'm just wondering...

    BTW I tried a couple of different battery applications and they gave similar results, so apparently the manufacturer has a different way to read the battery capacity, or maybe the batteries have lost a bit of its capacity over the time before being sold to the buyer.
     
  4. El Presidente

    El Presidente Beware The Milky Pirate!
    Moderator
    Rank:
     #5
    Points:
    3,118
    Posts:
    31,501
    Joined:
    Jan 3, 2011

    Jan 3, 2011
    31,501
    22,914
    3,118
    Scotland
    I think they lose a bit and you can never be 100% accurate on what the capacity is anyway. I'm also pretty sure that app isn't reading the battery itself, rather a file which tells the OS what size the battery is. One of the apps I've used on an old phone reported the same value, no matter what battery I had in.

    If you want, I'll see if I can dig out the article I found a while back that gave the true capacity of batteries against what the manufacturers report.
     
  5. lvt

    lvt Android Expert
    Thread Starter
    Rank:
     #97
    Points:
    283
    Posts:
    1,541
    Joined:
    Jan 30, 2013

    Jan 30, 2013
    1,541
    550
    283
    Male
    Paris <--> Taipei
    That would be fun to read, thanks in advance |>
     
  6. JanComputerman

    JanComputerman Android Enthusiast
    Rank:
    None
    Points:
    63
    Posts:
    273
    Joined:
    Jul 30, 2012

    Jul 30, 2012
    273
    37
    63
    Technology Consultant Software + Hardware engineer
    Newport RI
    You also have to have enough power left in the battery for it to be able to run the Nexus 7 to measure its capacity, so you never can run all the way down to 0 amp hours remaining, 3.0 volts without crashing the Nexus 7.
     
  7. Rxpert83

    Rxpert83 Dr. Feelgood
    Rank:
     #12
    Points:
    1,953
    Posts:
    17,940
    Joined:
    Aug 30, 2011

    Aug 30, 2011
    17,940
    13,151
    1,953
    Male
    Graduate Student
    MN
    I imagine its set lower than real capacity to kill the power before you damage the battery from having it drain too much
     
  8. balloonshark

    balloonshark Member
    Rank:
    None
    Points:
    16
    Posts:
    49
    Joined:
    Nov 21, 2012

    Nov 21, 2012
    49
    9
    16
    I believe this is true. Li-xx batteries are not like Ni-xx batteries that you can run clear down. If you run a Li-xx battery below around 3 volts it starts to lose capacity.
     
  9. lvt

    lvt Android Expert
    Thread Starter
    Rank:
     #97
    Points:
    283
    Posts:
    1,541
    Joined:
    Jan 30, 2013

    Jan 30, 2013
    1,541
    550
    283
    Male
    Paris <--> Taipei
    My N7 starts to turn off itself when the battery is at 4%, so I reckon that when the N7 is completely shut down the remaining battery capacity should be around 6-7%, right ?
     
  10. Demache

    Demache Android Expert
    Rank:
    None
    Points:
    183
    Posts:
    3,011
    Joined:
    Apr 18, 2010

    Apr 18, 2010
    3,011
    341
    183
    Sioux Falls, SD
    Probably actual capacity, yeah.
     
  11. Rxpert83

    Rxpert83 Dr. Feelgood
    Rank:
     #12
    Points:
    1,953
    Posts:
    17,940
    Joined:
    Aug 30, 2011

    Aug 30, 2011
    17,940
    13,151
    1,953
    Male
    Graduate Student
    MN
    You'll still want to get in on a charger soon though.
     
  12. JanComputerman

    JanComputerman Android Enthusiast
    Rank:
    None
    Points:
    63
    Posts:
    273
    Joined:
    Jul 30, 2012

    Jul 30, 2012
    273
    37
    63
    Technology Consultant Software + Hardware engineer
    Newport RI
    Just run it down to 50% and stop killing your battery capacity, the lower you run it down the more you wear it out and shorten its life.
     
    El Presidente likes this.

Share This Page

Loading...