There's a new uNu Aero battery case out there, and this one appears to be their first one for an Android device, as they have one for the iPhone 5S and iPhone 5. It is essentially a NFC enabled wireless charging battery pack for Galaxy S4. It has a 2600mAh battery pack inside, which doubles the capacity of your Galaxy S4, which already has a 2600mAh battery inside. So now you'll have a 5,200mAh battery for your Galaxy S4.
Obviously, the uNu Aero Battery pack comes with a side bezel, a back cover and the 2600mAh battery pack. It comes with the wireless charging back plate for the Galaxy S4, that way you can charge your battery with this battery pack for the Galaxy S4. This might sound confusing, but it's basically how the battery pack charges the stock battery inside your Galaxy S4. It's quite simple actually.
The uNu Aero case also gives you a charging pad, which you can charge your phone - with this battery pack on. Of course, this is going to add some bulk to your Galaxy S4, and if you like the size of your Galaxy S4 now, then you probably won't want this one. Of course, Zero Lemon does have a 7500mAh battery for the Galaxy S4 that's a bit thinner and less than half the price.
This case is available now from Amazon for $90. It's a great looking case and available in different colors to match your Galaxy S4, which is nice to have. We've got the link to the uNu Aero battery case down below, for those interested.
uNu Aero Series Samsung Galaxy S4 Battery Case with Wireless Charging Technology [Black/Black] - External Slim Protective Battery Case Cover for Samsung Galaxy S4 Compatibles with All Models Samsung Galaxy S4 i9500