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Oral-B Black 7000 Battery Replacement

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Use a soldering iron to melt the solder pad at the top of the motherboard, which attaches a battery electrode to the board. Remove the electrode by pulling it through the plastic housing after it has been desoldered from the board.

Repeat with the two solder pads on either side of the motherboard just above the black diamond-shaped component. The electrode foils can be pulled through the board from the back after the solder is melted.

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