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Using 7R's drop-in charger for 8R

Discussion in 'Ham Equipment' started by gzstwang0000, Feb 8, 2009.

  1. gzstwang0000

    gzstwang0000
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    The battery polarity is the same for 7R and 8R, and the charging
    contacts are identically distributed. The 8R battery fits in 7R's
    charger. So, it is feasible to use 7R charger for 8R. The only
    problem is that because the 8R battery is thinner and its charging
    contacts are about 15mm lower than the 7R's, the charging contacts
    cannot reach the charging pins.

    All you need to do is a very simple modification of the charger.
    Disassembly the charger by removing the 3 screws (1 on the bottom
    heat sink and 2 on the PCB). You can see that the end of each
    charging pin is T shaped, keeping it from moving outwards. Remove
    this stopper by either cutting or bending the T-shaped structure, and
    then bend the charging pins outwards to make them about 3 mm far from
    their original positions (don't make them too far outwards, or you'll
    have problem fitting the 7R battery). Re-assembly the unit, and
    you're done! Now the 7R charger can be used for BOTH 7R and 8R!



    When charging the 8R, you need to elevate the battery by putting
    something that is 15mm thick under it (I use an AA battery).
     

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  2. gzstwang0000

    gzstwang0000
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    the remaining pictures.
     

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  3. Moleculo

    Moleculo
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    Excellent information. Thanks for taking the time to post the info and pics...that will definately save a few people a few bucks.
     

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