Specifications: Capacity:700mAh Voltage: 3.7V Weight: 17.4g/0.6 oz Protection Circuit in the Anode to prevent short circuit Multiple layers of protection 500 charge cycles can be expected from a properly maintained battery. Fully covered wth a steel shell for impact resistance Over charge, discharge, short circuit, and over heating protection Three sets of over-head protection: Pressure relief valve protection, separate microporous protection, and PTC cathodal block protection This bundle includes, 2 X Fenix ARB-L16 rechargeable li-ion 700mAh 16340 batteries EdisonBright Battery carry case