Amazon.com: Fraternize 7.4V 2600mAh Rechargeable Battery Lithium li ion Batteries with XH2.54-2P Connector for Electronics, Lighting, Equipment 7.4v Battery Pack : Health & Household
Canadian 7.4v Li-ion 2600mAh 18650 Battery Pack
Lithium Battery 2600 Mah Rechargeable Battery - 7.4 V 18650 Lithium Battery 2600 - Aliexpress