Getting more life out of an iPhone 4.   I’m Fred Fishkin with technology BootCamp, a report on gadgets and gear.      Chances are, if you have been watching the battery life dwindle on your iPhone 4, you’re thinking maybe it’s time to buy a new iPhone 4S.   But there are alternatives that can extend the life of the iPhone 4.    Third Rail Mobility makes a cleverly designed case that pairs with slide on battery packs.   Co-founder and CEO Brian Lemelman….

“The battery module itself just snaps onto the case when you need it.    So if a user is using their iPhone, and they find that they’re uncomfortably low in terms of power, let’s say they’re down to ten percent or twenty percent power and they’re very busy using their phone.  You can actually snap on our smart battery module and use that battery only when you need it.  So you don’t always have to carry the battery and that bulk that you have with other types of embedded battery cases on the market.”

The Third Rail system sells for about ninety dollars.   You can find us at BootCamp.com.   I’m Fred Fishkin.