Olight HDC 18650 3500mAh 3.6V Li-Ion Button Top Battery
SuPower 7.2V 7.4V 8.4V 18650 2200mAh Lithium ion Li ion Rechargeable Battery Pack Max. 2A with built in protection circuit board|battery pack|18650 battery pack 7.4vlithium ion battery pack - AliExpress