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NW-HD5 Batteries - Cheap alternatives

Discussion in 'Headphones, Earphones & Portable Music' started by KiNeL, Sep 28, 2005.

  1. KiNeL

    KiNeL
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    I discovered something interesting about batteries today.

    The BST 36 battery for the Sony Ericsson J300i phone is physically identical in every respect to the LIP880 in the HD5, the only obvious difference being that HD5 is Lithium Ion whereas the J300i is Lithium Polymer.

    Having done a bit of research it appears that the difference between Lithium Ion and Lithium Polymer is one of physical construction not chemistry and they should therefore be directly interchangeable but I haven't tried it because:

    A. I already have a 2nd LIP880 and
    B. They are 49.99 Euros (I'm in Germany at the moment Oktoberfesting!).

    The REALLY interesting thing though is that BST 36 batteries and chargers are available for peanuts on Ebay, albeit from Hong Kong, and I'm seriously thinking of buying one for the charger if not the battery.

    Just type BST 36 into Ebay
     
  2. drmoze

    drmoze
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    Looks like it has about 10% less capacity than stock. But still a great deal: charger and battery for about $12....
     
  3. vonjeff

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    I believed that you can't use BST36 in HD5, although the size seems similiar, but the polarity of BST36 is reversed (+/-). Beware, it may damage your precious HD5.
     
  4. KiNeL

    KiNeL
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    Tnks for the tip, hard to believe but I'll check it out.
     
  5. mrtbag

    mrtbag
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    Also worth noting:

    The BST36 I think is 3.6v 780mA

    The Lip8800 is 3.7v 880mA
     
  6. drmoze

    drmoze
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    Can someone check the polarity on these batteries? This would be a great spare. The slightly lower capacity won't harm the player--still plenty of juice for a spare.
     
  7. danwalton

    danwalton
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    so is there any way to test this, cuz if it works then its a fantastic find!
     
  8. KiNeL

    KiNeL
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    I'm not in a position to check myself at the moment but I do see that + & - are marked on the LIP880 so maybe they are marked on the BST 36 also, I don't recall when I was looking.

    Maybe someone can pop into a phone shop and have a look.
     
  9. vonjeff

    vonjeff
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    Ok, I've uploaded the BST36 image.
    Sorry that I can't upload the LIP880 photo, but you can compare with your own.
    The position of opening for cathode / anode is different and the polarity is reversed.
     

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  10. KiNeL

    KiNeL
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  11. drmoze

    drmoze
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    Any chance another cell phone battery would have proper polarity? Any way to check on this?
     

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