iPhones have their share of power issues and a lot of them are being pinpointed on the batteries. Of course, it would depend as well on how often they would be used but just the same, the need for a handy charger would be something wise to have.
There have been a lot of chargers out there lately and today we spot this hybrid solar battery case from Monster Watts. The case features a 2,400 mAh batter and a solar panel at the back of the case. It has a LED indicator to display the battery life and is somehow thicker perhaps due to the battery and the panels that come with it.
Other than solar power charging, it can also recharge using the standard ways via USB connection. The Monster Watt Solar Battery case retails for about $118 in case you are interested in getting one.