2x Ampsplus 18500 1200mAh 3.7V Rechargeable Batteries Button Top + Storage Case

Battery: 18500. Nominal Capacity: 1200mAh. Version: Button Top. Battery BMS Protection: No. Weight: 33 gr. Chemistry: NMC, IMR / INR, High Drain. Battery Size: 17.95mm x 50.25mm.

eBay