Talentcell 12V Lithium ion Battery Pack, 11.1V/9000mAh 99.9Wh Portable Power Ba
Capacity: 11.1V/ 9000mAh 99.9Wh. Output: DC 12V/6A Max. But most guitar pedal input port is inner Negative(-), outer Positive(+). DC 5521: 11.1V (12.6V-9V) /6A Max. Do not throw the power bank into fire or water.