We have reported on a lot of portable batteries made for mobile phones, like the FatCat PowerBar 4200, most recently. These kinds of mobile phone batteries are a dime a dozen in their commonality. This particular Reactor from Gridcase is essentially a hand-crank battery made for the iPhone. It fits over the iPhone like the Mophie Juice Pack, and then the handle … [Read more...] about Hand-crank your phone with Gridcase’s Reactor