I recently purchased the NewTrent IMP52D Mobile Power Pack. It is easy to operate and even has an LED laser pointer and a small white LED for flashlight use. The laser pointer is easily visible 50 feet away, but the flashlight LED could be brighter. This power pack can be charged with any of your devices plug-in chargers or from a USB port on your PC. It even comes with a carrying case for the unit and its two cables.