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Prepare LR44 battery 2ea, Micro size hex L wrench set (1.27, 1.5, 2, 2.5mm …)
1. Unscrew four M2 screw using 1.27mm hex wrench.
2.Unscrew M3 Socket Set Screw using 1.5mm hex wrench.
3.Open the cover plate.
4.Detach the thermometer panel from body.
5.Open the battery cover.
6.Replace the battery.
7.Assemble in reverse order.