Idealpoint via Amazon offers the New Trent PowerPak 11,000mAh External Battery Pack and Charger, model no. NT110T, for $34.95. Coupon code "THE11PAK" drops the price to $18.95. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $5.44.) That's a buck below our August mention and the lowest total price we've seen. (It's a current low by $18.) This external battery pack is compatible with a range of iOS and Android devices.