System-S Battery Extender Portable Charger for Kindle Fire

With this practical battery adapter You can extend the operating time of Your gadgetry with micro USB connection (e.g. mp3 player, mobile phone). - Uses four AA-size batteries, which can fully charge your inside battery - A on/off switch to prevent power leakage when not in use and a LED power indicator - usable immediately, while charging, simultaneous charging and working - Will not overcharge - Current limited, with reverse circuit protection! - Pocket sized, lightweight, durable, small and handy - Connects directly to the standard port - A perfect backup when you are traveling - Works also with: 4 rechargeable 1,2 and 1,5V mignon AA battery - length of cable: ca 29 cm - non-frustration packaging shipment: battery adapter