It is a good quality battery holder for 2 cells of 18650 battery. The battery holder is a case for battery and prevents the battery from external damage and circuit from battery leakage. The body is made of either a UL94-HB flammability rating or a nylon plastic with a UL94-V-0 flammability rating. This is the perfect device to give an external power with minimum wire connection and soldering.
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