10,000 mah power bank but 6,000 output

Discussion in 'iPhone Accessories' started by kayleee, Nov 23, 2015.

  1. kayleee macrumors regular

    Joined:
    Nov 20, 2013
    #1
    I got a sony power bank which says its 10,000 mah

    however, on the back it says its 10,000 mah and states that it is output of 6,000 mah , which I was not aware before buying

    As i understand what output means....does it mean it will charge a 3,000MAH phone battery just twice, since it is 6,000 mah output

    Or, will it charge it 3 times, since it is actually 10,000mah (but I'm still confused about the 6,000 mah output)



    Help me pls did I waste money :I
     
  2. geoff5093 macrumors 68000

    geoff5093

    Joined:
    Sep 16, 2014
    Location:
    Dover, NH
    #2
    Can you link to the item you bought, or take a picture where it says that? Usually output is referring to the ability for the charger to output to devices, but it's usually measures in amps and not amp-hours. For instance it may look like "Output: 5V @ 4.8A (2.4A per port)"
     
  3. Givmeabrek macrumors 68030

    Givmeabrek

    Joined:
    Apr 20, 2009
    Location:
    NY
    #3
    mah is more accurate for a battery. It tells you how long it can supply the current unlike a charger on continuous power.

    If you believe the numbers it looks like it will charge the phone battery twice.
     
  4. CNeufeld macrumors 6502a

    Joined:
    Nov 25, 2009
    Location:
    Edmonton, AB
    #4
    Why wouldn't you contact Sony about this? Or try charging up your phone with it, and see how many times you can do it?

    C
     
  5. metsjetsfan macrumors 65816

    Joined:
    Feb 2, 2011
    #5
    Could it be that it holds 10,000 but 4000 is lost in the transfer. That does sound like a lot. Usually in my exp its about 20-25% lost in the transfer. So a 10,000 mah bank would have about 7500 available to charge a device
     
  6. Newtons Apple Suspended

    Newtons Apple

    Joined:
    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #6
    For it to have the same output it would need to be 100% efficient. That is not going to happen. I am betting you will only get about 2 full charges with the 2nd charge getting very slow to the end.
     
  7. geoff5093 macrumors 68000

    geoff5093

    Joined:
    Sep 16, 2014
    Location:
    Dover, NH
    #7
    mAh determines the capacity, not the output.

    That's true, but you don't see capacities written on the battery what the rate is after adding in the efficiency loss.
     
  8. HEK macrumors 68030

    HEK

    Joined:
    Sep 24, 2013
    #8
    Maybe it's marketing. Sony rounded up in ad but legally has to mark battery correctly?
     
  9. Mlrollin91 macrumors G4

    Mlrollin91

    Joined:
    Nov 20, 2008
    Location:
    Ventura County
    #9
    I have a 12,000 Anker battery pack and I get about 8500-9000 out of it after transfer loss. So about a 25% transfer loss. 40% seems like a lot for the OP, but it's not entirely out of the realm of possibility. Could just be an inefficient power bank.
     
  10. Abazigal macrumors 604

    Abazigal

    Joined:
    Jul 18, 2011
    Location:
    Singapore
    #10
    That sounds about right. You will typically lose about 40% in heat when using an external battery to charge anything. It's simple physics. Your product is not flawed.
     
  11. HEK macrumors 68030

    HEK

    Joined:
    Sep 24, 2013
    #11
    Wow that much loss
     

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