We use 18650 battery, its more safe and lower risk of explosion than polymer battery, So trust Ocoopa USB rechargeable hand warmer no problem.The upper limit of the operating temperature of the lithium battery is generally around 60 degrees Celsius, and the quality of the electrolyte is slightly worse, it may be around 55 degrees Celsius. For mobile hand-warmers, limiting the temperature of the heating sheet and ensuring the quality of the battery become hand-warmers security core.There are generally two types of lithium batteries, one is a steel shell 18650 battery, and the other is a polymer battery. Are USB hand warmers safe?Whether it comes from the outside or is generated internally, high-temperature work is a very dangerous thing for a battery.
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It can be seen as a portable charger that is connected to an electric heater.3. The shell, circuit board (control, charge, and discharge), batteries, heating element, and a switch are all that make up the hand warmer.
Rechargeable hand warmer structureThe structure of the rechargeable hand warmer is very simple. The predecessor of the hand warmer should be an electric hand warmer, but the electric hand warmer does not have much power storage capacity, and it is relatively large. Because the size is relatively small, it can be covered with both hands, so we refer to it as a hand warmer.The USB hand warmer is not a new invention, but we have improved on the original product. When the weather is cold it will heat up to provide warmth. Rechargeable hand warmers introduceA rechargeable hand warmer is an electronic product that has only been emerging in the past two years. Handwarmer Are USB Rechargeable Hand Warmers Safe? Ocoopa Give You Answer 1.
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