I just bought the Mophie Juice Pack Air for my iPhone 3G. Very nice. It combines an external battery with a hard case.
They say it roughly doubles the battery life of the iPhone, and makes the iPhone use the external battery's power first, so when it runs out you take it off and your iPhone is still fully charged. Thoughtful.
Obviously, it adds some size and weight to the phone, but only slightly more than most hard cases. It also maintains the look and curves of the iPhone inside, so it just looks like you have a large iPhone.
Another nice feature is the Mac-style battery status meter on the back, with the button and 4 LEDs so you can see how much power the external battery has.
It allows you to sync to iTunes through the case, but I wish its external USB attachment was a standard iPod 30-pin dock connector... Oh well.
Still, a very nice product, and not a bad price considering its competition.
Discovered one more great use for this:
ReplyDeleteSometimes I need to charge the iPhone for going out later, but I also need to use it for stuff right now. Rather than awkwardly try to use it in the dock or with a cable to the computer hanging out, I can just slide it into the (charged) juice pack and it will charge just as though it's in the dock. Once charged, I slide it out and put the juice pack back on charge.
Kinda like having a portable power point! :-)