Reuse Old Batteries As A Power Bank

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Remove the protection board

CAUTION: Before starting this guide, make sure that the batteries are fully drained (0%)
We are using old batteries from the iPhone 7 Plus and iPhone 8 Plus. Peel off the tape on the battery protector off with tweezers.
Please use non-conductive tweezers to avoid short-circuiting the battery.
Apply tin to the anode and cathode of the battery with a soldering iron at 365°C. Heat to remove the protection board.

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