BuyDig offers the XtremeMac InCharge Boost 2,300mAh Battery Pack for iPhone, iPod, and iPad, model no. IPU-ICB-13, for $6.99 with free shipping. That's $3 below our December mention and the lowest total price we've seen. (It's also $14 under the best price we could find for a similar model.) It features a 30-pin connector, USB to microUSB cable, and LED indicators.