Naphos via Rakuten Shopping offers the New Trent PowerPak 11,000mAh External Battery Pack and Charger, model no. NT110T, for $21.95. The price drops in-cart to $19.95. With free shipping, that's $2 below our mention from two days ago and the lowest total price we've seen,. (It's a current low by $17.) This external battery pack is compatible with a range of iOS and Android devices. Deal ends August 19.