AnkerDirect via Amazon offers the Anker Astro E5 15,000mAh External Battery Power Bank in Black, model no. AK-79AN15K-BA, or White, model no. AK-79AN15K-WA, for $49.99. Coupon code "AASTROE5" cuts it to $35.99. With free shipping, that's $4 under our mention from February and the lowest total price we've seen. (It's also $14 under the best price we could find for it elsewhere, but bundled with a dual-port USB charger.) It features dual USB ports to simultaneously charge two devices, LED status lights, a flashlight, and USB cable.