Amazon.com: 26650 Rechargeable Battery with Charger, 6800 mAh, 3.7 Volts, 26650 Batteries for flashlights and Other Equipment. (Style 2) : Health & Household
1-8PCS New 26650 rechargeable battery 50A lithium battery 3.7V 5000mA 26650 50A INR26650 battery 26650 Suitable for flashlight - AliExpress
Genuine 26650 KeepPower 5500ma Protected Flat Top Battery.