Philips Avalon FM20 Service Manual page 186

10 Repair and Disassembly
Remove the battery carefully, by loosening its connector, sliding the battery to the right and then
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pulling it out.
If you only want to replace the battery, insert a new battery and perform the above steps in reverse
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order. If you want to remove the entire battery assembly, continue with the steps below.
Disconnect the battery board connector from the main CPU board.
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