3.6V 3350mAh 1S1P 18650 Cylindrical Li-Ion Battery Pack with options for connectors, housings, contacts or solder tables, now IEC621333 certified, Model BL3500C1865001S1P****** (1INR19/66) | GlobTek
Nitecore NL1835 18650-battery 3500mah | Advantageously shopping at Knivesandtools.com
NiteCore NL2150R 21700 battery with usb-c-port, 5000 mAh | Advantageously shopping at Knivesandtools.com
Rechargeable batteries - 18650 | NKON
Lezyne Battery 18650 2400 Mah Wire - Batteries | Lezyne Store