Powerbank with non-built-in batteries, so if the battery is not good the unit does not have to be thrown away. It comes with 3X 21700 Li ion batteries (2 brand new 4000maH, one 5000maH). It can fit a range of battery sizes (18650 to 26650). It is also a fast charger. Output: 5V/2A, 9V/2A, 12V/1.5A
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