Special Notes: 0. This product is not for wheelchair use, and the product details page does not mention that it can be used for wheelchairs. 1. The main reasons why the product does not heat up are as follows: (1): The ambient temperature is too low, and some people who are not sensitive to heat cannot feel it and mistakenly think that the product is not working. (2): The laundry bag was not used to protect the product during washing, resulting in damage to the internal heating plate. (3): The ambient temperature is too low and the battery may not start, and the heating function cannot be used normally without power. (4): The battery does not support this product, and the mobile power supply used is not applicable. 2.
eBay