** To get this price use code OMAKERDS at checkout **
Was looking for something like this given the iPhone's infamous battery life and this seems to get very good reviews on Amazon and for the price seems to fit the bill exactly.
Claims to be " (US Amazon #1 Best Seller in Power Banks) "
I have purchased several OMAKER products recently and have been impressed with the quality. Especially the cases and screen protector so hope this lives up to the same standards.