2 Pack Fenix ARB-L18 3500mAh Protected 18650 Rechargeable Li-ion Batteries with EdisonBright BBX3 Battery Carry case - Designed for TK75 TK16 TK22 TK35 PD35 PD32 TK09 are-X1 are-C1 are-C2 and Other 2 Pack ARB-L18-3500 (Capacity of 3500mAh) Rechargeable and can last for up to 500 charge-recharge cycles Chemistry is lithium-ion (li-ion) protection: overcharge protection; over-discharge protection; and short circuit protection; three kinds of protection from potential over-heating: pressure relief valve protection; microporous protection; and PTC cathodal block protection Bundle comes with a EdisonBright BBX3 battery carry case