Program to check power bank capacity?

Discussion in 'Computer Hardware, Devices and Accessories' started by Bedel, Mar 10, 2017.

  1. Bedel
    OP

    Bedel The key of the blade

    Member
    981
    330
    Oct 28, 2015
    Well I've bought a power bank in orther to use it with my Android, Switch and PC, so I get one that presumibly has 30000mah. The question is I don't kinda trust in the store where I sold it, and I wanna make sure it's 30000mah and not only 15000.
    Is there any program to check this?
    Thanks in advance.
     
  2. nero99

    nero99 GBAtemp Advanced Maniac

    Member
    1,860
    838
    Sep 18, 2014
    United States
    I think you would need to get some special electrical equipment to test that
     
  3. Bedel
    OP

    Bedel The key of the blade

    Member
    981
    330
    Oct 28, 2015
    Can't be done by software? Well I thought it could because a phone or a PC can, but being USB charge make things diferent, now that you say it.
    If any one know something about it, I'll be watching.
     
  4. Minox

    Minox Spytech Employee

    Supervisor
    5,991
    2,503
    Aug 27, 2007
    You would want to draw a certain constant load from the power bank and then see how long it can provide said power while measuring how much is being drawn. That is not something you can do with computer USB ports as those are designed to provide power, not draw power.
     
  5. Originality

    Originality Chibi-neko

    Member
    5,334
    778
    Apr 21, 2008
    London, UK
    Most people measure power bank capacity by seeing how many times it can charge a device with a known capacity battery.

    For example, if an iPhone 6 has a 1810mAh battery, and a power bank charges it 3 full times and dies half way through the fourth charge, then you know the capacity is at least 1810x3.5= 6335mAh.

    It's not an exact science because of the inefficiency of It all, but it gives you a good approximation.
     
    Last edited by Originality, Mar 10, 2017
    Bedel and Minox like this.
  6. Bedel
    OP

    Bedel The key of the blade

    Member
    981
    330
    Oct 28, 2015
    I'll try this out, thanks!