rugged cases with batteries vs usb battery packs
the thing that puts me off cases with batteries, either as replacements to removable batteries, or ones that plug into the charge port, is that when you inevitably get a new phone, you are left with a case / battery that is no good to you, and you need to buy a new one.
With a USB battery pack, I change my phone, and it still works with the new one, it can also be used to provide emergency power to more than _just_ my phone.
Biting the hand that feeds IT
