Do you need a lot of power? Best portable charger: The MacAlly 13000mAh Power Bank Unboxing & review

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[@rich1051414]

The only thing I worry about is, to maximize capacity, you have to minimize the current output.
The reason this is is inherient to batteries, the more surface area you can squeeze into it, the higher the capacity, but this is also detrimental to the current carrying capability, as increasing exposed surface area decreases the thickness of the conductor, which is the same foil that has had it's surface area maximized.
I don't doubt the high capacity, but I do question the current output. You can see that they didn't make both USB ports high amperage, and I bet that is for a reason. I also question the longevity of extremely high capacity devices, as the foil used is extremely thin.