System-S Backup Battery Charger Extender for Asus Google Nexus 7
Backup Battery Charger & ExtenderTechnical Details:Insert four conventional 1,5V Mignon AA size batteries into the pack and have a portable power sourceTotal running time with connected battery adapter will be extended for hours (depending on the used batteries up to 8 hours)Eliminates traveling with a ac adapter or charging cradleCharges your battery or provide backup powerLightweight , slim and compact size.Protective circuit to preventovercharging (IC chip)!LED charging indicatorUses four AA-size batteries, which can fully charge your inside batteryA on/off switch to prevent power leakage when not in use and a LED power indicatorusable immediately, while charging, simultous charging and working    Will not overchargeCurrent limited, with reverse circuit protection!Pocket sized, lightweight, durable, small and handyConnects directly to the stadard port    A perfect backup when you are traveling    Works also with: 4 rechargeable 1,2 and 1,5V mignon AA batterys    Cord Length: 12 inches with plug connectorIncluded in Delivery:1 Battery-Accu-Pack without AA-Mignon-Batteries