Newegg offers the second generation Anker Astro E4 13,000mAh External Dual USB Battery Pack in White, model no. A1207H21, for $29.99. Coupon code "EMCEGEG37" cuts it to $19.99. With free shipping, that's tied with our November mention and the lowest total price we've seen for this battery pack. (It's a current low by $14.) It features an LED flashlight, fail-safe protection, and device detection for up to 3-amp charging. Deal ends February 8.