Powering Mobile via Newegg offers the Cellevo 13,500 mAh Universal Portable Battery
, model no. YP13500, for $29.99
with free shipping
. That's tied with last week's mention, $70 off list, and the lowest total price we've seen for a 13,500 mAh battery this year. It's compatible with Apple iPad / iPhone, Samsung Galaxy S, tablets, laptops, and smartphones.