The BattBorg supports most off-the-shelf batteries or battery packs between 7-36V and offers up to 14 hours of battery life for the Raspberry Pi Model B+ from 8xAA rechargeables??? ???The BattBorg is a power converter for your Raspberry Pi which allows you to power the Raspberry Pi off batteries,??? explains PiBorg’s Tim Freeburn. ???It will work with most batteries/battery packs that are between 7-36V so it’s great for 12V car batteries, 8xAA battery packs, and so on. We’re including an AA battery holder in two of the kits as rechargeable AA’s are inexpensive, and readily available at most shops, and Ebay.???