Battery pack Magicshine MJ-6036 for bike flashlights (6x18650 BAK, 7.4V, 6.6AH)
Magicshine® MJ-6116C 7.2V 7.0Ah USB Battery Pack –Round Plug - Magic Shine UK
4400mah Rechargeable Battery Pack For Magicshine Bicycle Led Light/lamp Mj-870/mj-808/mj-808e/ct-808/mj-6008/mj-828/mj-6002 - Digital Batteries - AliExpress