MiLi Powerspring Juices Up iPhone 4s
MiLi is no stranger to iPhone battery packs. So it should come as no surprise (it doesn’t to us), that today they released the MiLi Powerspring 4. It’s a 1600 mAh backup battery case for the iPhone 4. It should double your battery life, that is depending on what you’re doing. In our experience MiLi’s batteries have a checkered past in terms of power output. Total charge time, according to spec, is 4 hours, which seems a bit high, but at least you won’t be tethered to a wall while rejuicing your phone.