This is a lightweight, small-sized power source that carries a big charge. Perfect for commuters, students - anyone not consistently tethered. The iTorch has power to spare. Especially useful for users of power-hogs like video and/or game apps, the iTorch provides multiple full charges for mobile devices. This is a product that does what the manufacturer specs say it will - and then some. Here's my benchmark test: from a full charge, I let my iTorch sit unused (unplugged) for 3 weeks. I then used it to charge my iPhone 4S, iPad 2 3G, iPod Touch 4G, Sony Ericsson Xperia Play, and New Trent IMP38B Bluetooth keyboard/case...and the iTorch still isn't drained.