Safety is the key to choosing the right Power Bank, 1. Battery Quality Grade A is a general concept used to denote a very good quality battery. The real test is whether or not the battery has a UL Certification. 2. Protective Circuitry The Protective Circuitry or PTC is considered a Safety Valve. It protects the equipment, thecharged device, and user. PTC prevents Internal and External Short Circuit, Abnormal Charge/Over Charge, forced ...
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