So many batteries on the market and you don't know what to choose? We only work with trusted brands and all of our 21700 batteries is authentic.
1. Excellent 3 sets internal safety protection: PTC cathodic block protection in the front, separate microporous protection in the middle, pressure relief valve protection in the bottom, so our batteries is very safe for daily usage.
2. Excellent 3 sets external safety protection: thermal overheat protection in the top, both ends with a nickel-plated S.S protector make sure high impact resistance. injection-molded protection circuit make sure high usage security. Durable metallic film make sure high against abrasion.