1, find the back of the thermometer, i.e., there is no LCD display of this side of the lower part of the middle, to find a semi-circular rows of small cover.
2. Use a small screwdriver to turn out the screws on the small cover and open the cover.
3, then you can see the button battery half is still stuck in the body, part of the exposed part of the edge of the two ends of the black plastic card, find the two ends of the black card in the middle of the gap, the tip of the screwdriver inserted into the gap, and force the top of the forward, the battery will be automatically popped out.
4, thermometer switch has a small screw with a screw wrench to unscrew it. Remove the battery, check the model number and buy the same model to replace it.
5. Re-tighten the screws and replace them with new batteries.