There's some amazing charging solutions out there for smartphones these days. From the awesome Juice Pack range from Mophie to the upcoming Resurgence range from Otterbox.

But if you love your current case too much, or you need a case with a bit more protection, then you'll probably be looking for other charging methods. If this is the case, then we recommend the Ultra Slim External Batter Charger. With a USB output, you can charge any device using your own cables.

It's called Ultra Slim for a reason, being slightly larger than a credit card – this charging solution will fit in most wallets. Now you can have the same portable charging as everyone else AND keep the case you want.