Amazon.com: 1Pcs 18650 3.7v 4400mAh 1S2P Li ion Rechargeable Battery Pack with 2.0Pin JST-PH Connector 16.28Wh/4.4A, Blue, 6.6 x 1.8 cm (19.28Wh/4.4A) : Health & Household
18650 Blue Lithium-Ion Rechargeable Battery - 3.7V 2600mAh | xUmp
Pack of 2 Rechargeable Li-ion 18650 Battery 3.7V 2500mAh