Make Power bank using battery 3,7v convert to 5v by mini invertor

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Make Power bank using battery 3,7v convert to 5v by mini invertor
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[@yousefLa52.]

Should the wire for the coil be insulated????

[@amogus5335]

amperage?

[@danielp9618]

What will be the output current of this circuit?

[@jeremiahemereonye1075]

Pls does the circuit give the phones battery extra life if left to charge for some minutes?

[@yousefLa52.]

the Transistor is : 1815 or 1518
?????????????????

[@sobreviventealpha1106]

Very good Bro

[@YashwinTechnical]

Nice

[@valtersouzaribeiroribeiro9534]

Good good

[@badeadrian]

Or just buy one... they are already on the market

[@waledaljanabi8246]

Sweet thought
I tried to make one but it didn't work
I want to make 5 pieces for me and my friends
I will pay you the price of money for you. Do you agree

[@user-tp1fy4ji3d]

Этим повер банком только старые кнопочные телефоны заряжать ,ампер очень мало