Power Cover

Discussion in 'Microsoft Surface Accessories' started by TeknoBlast, Apr 16, 2014.

  1. TeknoBlast

    TeknoBlast Active Member

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    So I purchased the Power Cover yesterday. I did all the updates and let the Surface and cover charge all night last night.

    Now I have it here at work and it's working fine.

    Just wondering which battery drains first? I see in the indicator, Battery 1 and Battery 2. I assume Battery 1 is the Surface's battery.

    So do the batteries together works as one big battery or does one drain first and then the next?

    I did some searches here, but really didn't find the answer or maybe I wasn't using the right keywords to get the answer I'm looking for.

    Thanks all.
     
  2. jnjroach

    jnjroach Administrator Staff Member

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    The Power Cover will keep the Surface Device Charged to 100% until it is completely depleted (I get 3-3.5 hours) then the Surface's main battery will kick in. On recharge, the Surface main battery will recharge to 80% then the Power Cover will start charging until it reaches 90% then the Surface Main will charge to 100% and then the Power Cover will charge it last 10%. Charging will only happen if the Surface is in Sleep or Powered On.
     
  3. TeknoBlast

    TeknoBlast Active Member

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    Thanks, the above part is good to know. I assumed that both would charge even when the Surface is off. Good thing I left it on last night.
     
  4. gabe406

    gabe406 Member

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    I can't believe that the power cover was designed to be charged while on or in sleep mode. That is just wrong. Really, now I have to keep my SP2 on until the power cover is charged or put it in sleep mode? So basically the power cover has to have a powered connection through the SP2 to charge.
     
  5. jnjroach

    jnjroach Administrator Staff Member

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    Correct, it done through the additional spines on the Cover, it regulated by the Surface Device (I'm assuming).
     
  6. gabe406

    gabe406 Member

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    Its really interesting. You are 100% correct! I plugged in the SP2 with the Power Cover and I watched the battery levels. The SP2 charged to a little over 80% then the cover started charging close to 90% then the SP2 returned to charging to 100% then the cover charged to 100%. Its funny how that works. Thanks again for your help.
     
  7. jollywombat

    jollywombat Member

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    Does anyone know what the mah of the battery is for the power cover? Have some extended travel coming up and was trying to decide between getting a power cover or a external power pack. Was surprised to see it was not listed on the Microsoft specs site.

    Thanks,
     
    1 person likes this.
  8. rushdown

    rushdown New Member

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    On surface pro 2, how much usage time are you guys getting with fully charged surface pro 2 and power cover?
     
  9. jnjroach

    jnjroach Administrator Staff Member

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    On a normal day or work using Office (Word, Excel, PowerPoint, OneNote, Outlook, Lync), IE, Meetings, Presenting, etc.. I get 10-11 hours....
     
  10. jnjroach

    jnjroach Administrator Staff Member

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    Powercfg.exe /batteryreport reports 27,565 mWh for the Power Cover and 42,050 mWh for the Internal Battery (This is on the Surface Pro 2).
     
  11. demandarin

    demandarin Active Member

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    Wtf! The power cover finally released? I need to keep up on this forum more..lol
     
  12. kayzee

    kayzee Well-Known Member

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    It was released a while ago now, but not in all countries.
     

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