F&F FW-WSO4, Быстрый старт, Страница: 5 / 8

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Remove the button key by gently lifting the lower or upper edge of the
button with a flat tool.
Unscrew the marked screws.
Remove the electronics board.
Eject the used battery and insert the new one, paying special attention to
the correct polarity ("+" sign of the battery upwards).
Assemble the button by following the disassembly steps in reverse order.
Do not dispose of used batteries in a waste bin! The user is obliged to hand
over the used batteries to the recycling materials collection point.
Battery change