This is the smart phone power bank. This power bank have ability to charge most of android and china phone. This power bank’s output voltage is 6V. You need a 9V battery to use this power bank. One fact is the battery is not rechargeable. You don’t need a circuit for make this power bank. Just a voltage regulator IC – LM7806 that can perform it to charge a phone. Like this video? Please subscribe me.
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