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Add Internal battery to Craig Bluetooth speaker? Answered

I have a Craig CHT913 Bluetooth speaker that must be plugged in to operate. I have a picture of the min board attached and was wondering if someone can tell me if the two solder points labeled '3.7v' and 'GND' are for a backup battery? how can I test to ensure that this is what it is for without ruining the board?

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Downunder35m

3 years ago

Seems to be pretty obvious.
And with 3.7V any cellphone battery should do.