Magic-Pro ProMini 4000+/S external backup battery review

There are so many external batteries available these days that once you’ve sorted out what  USB amperage output you require, the decision becomes one of capacity, size, weight, shape and form factor.  Capacity, weight and size become a compromise of course; the bigger the capacity, the bigger and heavier the unit will be. Most of [...]

Source: http://the-gadgeteer.com/2012/10/23/magic-pro-promini-4000s-external-backup-battery-review/

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