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Thread: how to mod an Ultrafire WF-501B for built in charging

  1. #1
    Unenlightened
    Join Date
    Mar 2011
    Posts
    1

    Default how to mod an Ultrafire WF-501B for built in charging

    Hi,
    My bike helmet has two WF-501b ; white looking forward , red flashing back.
    I don't like pulling the cr123a batteries for charging and I'm looking for a way to bring
    the connections outside so I can charge the batteries in place.

    I have an external charger that does 1,2,3,4 batteries in series, so
    I'm thinking that a small mod to the cap would gain access to a 7.4 volt increments instead of each 3.7.

    This issue must come up so I'm looking for some tips but I don't know what to call it.

    Thx,
    Last edited by lumenfool; 03-15-2011 at 12:07 PM.

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