Amazon.com: HTRN 3.7v 18650 2500mah 1s1p Li-Ion Battery, with PCB Wires and Jst Ph2.0 Connector : Sports & Outdoors
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