Raise your hand if your iPhone 4 has ever flashed the 20-percent-left battery warning at a most inopportune time, with no usable or practical outlets in sight.
Yep, me, too. I've been the girl scanning cafe walls, poking at ambiguous hinged metal floor plates, and scouring airline gates in the hopes of finding a power source more times than I'd like to admit. If that's you, too, you should consider investing in a charging case that's equipped with its own battery pack.
Over the last few weeks, I slipped CNET's iPhone 4 into both the … Read more