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  1. My requirement is:
    (1) Circuit is Operated by Nokia
    standard cell phone charger
    (2) Battery nokia 3.7 volt
    (3) Auto ac to dc changeover system
    when ac fail
    (4) Battery overcharge protection
    system(auto battery full charge
    cutoff) with LED indicator.I have tried
    many times to develop such type of
    circuit but i failed. So Please bro help
    me urgently. Please design it simple.

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