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Remington MB320C Battery Upgrade to LiPo and USB charging

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Circuit isolation

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Take out the circuit board with batteries and motor

Unscrew the switch on the circuit board (2 parts, 2 screws)

Desolder and separate the battery (weakly glued on to circuit board) (also remove the foam filling below the battery in the case)

Desolder the motor and set it aside

Desolder the old charging port

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