Dual USB Mobile Powerbank Leiterplatte Schnellladen Intelligenter Schutz
6,69 €
The insulation between the battery and the circuit board, battery not to touch the circuit board, so as not to cause a short circuit. The circuit board is connected to the battery negative B-, B + is the positive, do not connecting reversed, connecting reversed will burn the board, the battery is connected in parallel welding, assembling battery.
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