26650battery High Capacity 26650 5000mah 3.7v Li-ion For Flashlight Power Bank 26650 Lithium Rechargeable Battery - Rechargeable Batteries - AliExpress
Keeppower 26650 - 5200mAh, Li-Ion 3.7V - 3.6V - PCB protected with USB charging P2652U | akkuteile.de