Let’s face it: If you have an iPhone 4, you need a battery case. Unless all you’re doing with your iPhone is using it as a $600 mirror.
Luckily there’s no shortage of choice — so we’ve assembled a collection of promising candidates and put them through their paces, the results of which we’ll be revealing in the next few days.
First up is the XtremeMac InCharge Mobile ($80), selected from XtremeMac’s deep line of charging solutions (all of which have been given the “InCharge” moniker).