At present, there are three kinds of hand warmers in the market, namely electrode type hand warmers, electric wire type hand warmers and electric tube type hand warmers. The sales of electrode hand warmers have been banned because of potential safety hazards.
In addition to electrode heating, electric hand warmers heated by electric heating wires and electric heating tubes can be safely used.
How to select
① Observe whether the product model, electrical parameters, factory name and address are marked on the package of the product.
② Select electric hand warmers with water and electricity isolation and dual temperature control protection.
③ Touch it slightly with your hands.
For electric heating tube (metal heating tube), it has obvious metal U shape or other shapes.
If the heating wire is used, it will have a plastic block, and it will wrap the heating wire around the plastic block.
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