cheap, small and convenient for travel

Power, I need power. All the technology nowadays ferrets are quite nice, but unfortunately the battery problem is not solved yet, so I'm not leaving without additional external battery out of the house. Here you have a stylish and functional companion. Card size and enough juice to fully recharge once a big smartphone like the Samsung Galaxy K. The charging socket is virtually hidden, unfortunately, the cable is very short so you can not hold the phone in your hand and the card in your pocket, but it dangles just next to the smartphone so around. Of course, no matter at a table-top solution, but just a mobile battery should also be good mobile usable and have a longer cable. Is loaded relatively quickly and a colored LED indicates the status of the battery.