Buy.com offers the Miccus ChargeBlock XL Battery Charger for Apple iPhone / iPod, model no. CBFI-15, for $19.99 with free shipping. That's the lowest total price we could find by a buck, although we saw it for $2 less in May (since expired). This 1,500mAh external battery powers and recharges your iPhone or iPod using the 30-pin dock connector. Deal ends August 26.