lithium ion battery 11.1 v 4400mah rechargeable Pack 18650
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
Tenergy Lithium Ion 18650 Battery - BatteryJunction.com
11.1v 5Ah li ion battery 18650 3s2p for access control panel