MyCharge's latest battery pack is RazorPlus ($60), a 3000mAh backup power device. Extremely slim -- it's only 0.32" thick -- the unit has a single 1-Amp output, so it's best suited for iPhones and iPods. The company claims it'll provide up to 13 hours of extra talk time, 14 hours of video playback, 59 hours of music playback, or 13.5 hours of Internet browsing. Technologies inside will moderate the power output based on what's connected. A micro-USB…
