Samsung's 9,000mAh battery pack caught in pictures and video
3.2v -9000mah 32700 Lifepo4 Battery 9000 Mah Battery 55a High Power Maximum Continuous Discharge Battery - Rechargeable Batteries - AliExpress
In The Core 3.7v 9000mah Large Capacity Lithium Polymer Battery 9ah Mobile Field Emergency Power Backup Rechargeable Li-ion Cell - Digital Batteries - AliExpress