Hand warmers are not hot. What is the reason? How to fix it?

The reasons and solutions for this product not being hot are as follows:

1, deflate, hand warmers are used for a long time, and too much gas is produced, which will also lead to overheating. You need to open the small hole above to deflate.

2. Replace the charger. There is something wrong with the charger of the hand warmer. You can try changing a charger.

3. Repair the power supply. If the power indicator of the hand warmer is on, it means that the power of the hand warmer is good. At this time, you need to find a professional master to repair the power supply.

4, replace the battery, hand warmer battery damage will also lead to charging is not hot, at this time need to replace the battery.