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    5920g battery, which one to choose?

    Discussion in 'Acer' started by jhonst, Jul 4, 2011.

  1. jhonst

    jhonst Notebook Enthusiast

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    Hi..

    I wish to replace the battery from my 5920g, but after a few searches i got several models:

    -10.8V 4400mAh
    -10.8V 4800mAh
    -11.1V 4400mAh
    -11.1V 5200mAh
    -14.8V 4400mAh
    -14.8V 4800mAh
    -14.8V 5200mAh

    The battery that came with the laptop is 11.1V 5200mAh (AS07B41)..but the previous owner said the it was better to purchase a 14.8V battery..so which one i should choose?

    Thanks
     
    jhonst, Jul 4, 2011
    #1
  2. .NetRolller 3D

    .NetRolller 3D Notebook Deity

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    Get the 14.8V 5200mAh if you don't mind using 3rd-party replacements. If you want an original Acer battery, the best you can get is 14.8V 4800mAh.

    Why?

    Because you get the actual power capacity of the battery by multiplying the voltage with the mAh capacity. So, a 11.1V 5200mAh battery can hold 57.72 Wh of charge, while a 14.8V 5200mAh one can hold 76.96 Wh. At a typical discharge rate of 20W, that means almost an entire hour of battery life.
     
    .NetRolller 3D, Jul 4, 2011
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  3. jhonst

    jhonst Notebook Enthusiast

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    Thanks for the answer :)

    I got confused because i thought minor voltage means less power consumption..but has you explain a 14.8V is better than 11.1V. I will get a 3dr party battery.
     
    jhonst, Jul 5, 2011
    #3
  4. .NetRolller 3D

    .NetRolller 3D Notebook Deity

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    Inside the laptop, the battery's voltage is always regulated down to the same value, as required by the various electronic components. So, power consumption will always be (relatively) constant. What matters, is that at a higher voltage, it takes a lower current to supply the same power to the system.
     
    .NetRolller 3D, Jul 6, 2011
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  5. weetoots

    weetoots Notebook Enthusiast

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    I don't understand this. "At a typical discharge rate of 20W, that means almost an entire hour of battery life. "
    If you have 76.96 Wh, wouldn't you get about 3.8 hours run time?

    Please straighten me out. :confused:
     
    weetoots, Jul 8, 2011
    #5
  6. downloads

    downloads No, Dee Dee, no! Super Moderator

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    He meant an additional hour of battery life that you get from a 14.8V battery compared to 11.1V.
     
    downloads, Jul 8, 2011
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  7. BahBah

    BahBah Notebook Enthusiast

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    @jhonst
    Have you already purchased your third party battery? I am in the exact same situation, and am debating what sort of battery to buy.
     
    BahBah, Jul 13, 2011
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  8. Zapperpower

    Zapperpower Notebook Evangelist

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    got it.

    but what about cells? why do I see on ebay

    10.4V/8000mah/12cells
    11.1v/8700mah/9cells
     
    Zapperpower, Jul 13, 2011
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  9. jhonst

    jhonst Notebook Enthusiast

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    I will purchase a 5200mah with 14.8v..but these ones are almost 2x the price of a 11.1v battery. I´m looking on Ebay for good deals..
     
    jhonst, Jul 13, 2011
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  10. .NetRolller 3D

    .NetRolller 3D Notebook Deity

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    Well, almost 2x the capacity for almost 2x the price... what do you expect? :)
     
    .NetRolller 3D, Jul 13, 2011
    #10