Ansmann 18650 9,36 Wh Non-standard battery (rechargeable) 18650 Li-ion 3.7 V 2600 mAh | Conrad.com
Amazon.com: 3.7V Li-ion 18650 Rechargeable Battery, 2200mAh Full Capacity 18650 Rechargeable Batteries Lithium ion Battery Durable Battery, Used for LED Flashlight, Electronic Devices etc(Flat Head , 2 Pack) : Health & Household