Today only, All4Cellular offers the Stitchway 1900mAh Backup Battery for iPod / iPhone, model no. CHEX-ALL-BK-08-319, for $4.49 with free shipping. (Seller1ON1 via Amazon has it for the same price.) That's tied with our mention from three weeks ago as the the lowest total price we've ever seen for this battery. It purports to offer a full charge in less than two hours.