How to make 3.7-volt battery charger:
How to make 3.7-volt battery charger? This is the circuit diagram of the 3.7-voltage battery charger. this is an auto charger diagram. normally we can’t find a 3.7 voltage transformer to charge this battery. we got 5-voltage or 6-voltage chargers. we can find 5 voltages everywhere. now every mobile charger is 5 voltage. every USB port got 5 voltage. we can take voltage from the mobile charger or USB port.
We can get 5 voltage but we need 3.7 voltage to charge this battery. so for this, we need this circuit to charge the battery. this circuit got a charging LED and a fully charged LED.
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