In reply to berna:
> The best thing, it has a 2A output so while not mega nice to your bateries it will charge a phone quite quickly.
The charge current of a LiIon phone battery, charged by the phone, is determined by the charging circuitry
in the phone, not by the current capability of the external source (assuming the external source is capable of supplying enough current for the phone to charge).
A power source that can source 2.1A is good for charging things that will use that 2.1A; an iPad, for instance. Other devices that use a lower charge current will only take whatever current they need to charge their smaller batteries.
In other words, the Jackery charger won't be 'not mega nice to your batteries'.