Building a charge circuit need advice - Raspberry Pi Forums

i'm having build new charge circuit since powrboost module no longer relevant pi 3 , use advice.

attach battery charger leads run step gpio or test pads on pi. problem if battery dead , use micro usb send current through step up.

should use switch stop voltage when using micro usb or build protection circuit.

charger standard 5v 1a charger 3.7v lipos , use drok 5v 3a step up. or use pololu 5a takes lot of space in of cases.

best way make circuit.

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