Panasonic 100%Original Protected 18650 NCR18650B Rechargeable Li ion battery 3.7V With PCB 3400mAh For Flashlight batteries use|Replacement Batteries| - AliExpress
PAN 18650 B: Industrial cell, 18650, 3.6 V, 3400 mAh, unprotected, pack of 2 at reichelt elektronik