Hand warmers are very safe as long as they are used normally.
The hand warmer is different from ordinary electric hot water bottles. It has a waterless design and uses the latest double-sided graphene heating film, which achieves warmth through graphene heating.
While heating is faster and more efficient, it completely solves various safety problems such as gas explosion when charging the traditional hot water bottle, scalding due to water leakage and so on. It can be said to be the safest warm-keeping artifact currently on the market.
Hand warmers can be roughly divided into three types:
1. Those that generate heat by heating water, which is what we commonly call hot water bottles. Unlike traditional hot water bottles, electric hot water bottles eliminate the need for To avoid the trouble of adding water, you only need to plug it in and wait for ten minutes for it to heat up. It actually boils the water inside, so the temperature will generally be very high.
2. It generates heat through chemical reactions. The hand warmers on the market are of this type. Through the contact of chemical substances inside, the heat generated has a temperature of about 40°C.
3. Use the lithium battery function, the internal heating plate generates heat, and uses the USB interface to charge and discharge, similar to the hand-warming mouse pad. Because the lithium battery can be charged and discharged, it can generally be used as a mobile power supply. It is small in size and easy to carry around, and the temperature can reach about 50℃.