AnkerDirect via Amazon offers Prime members the Anker Astro3E 10,000mAh External Battery Pack in Black, model no. AK-79ANS1052-BA, for $25.99 with free shipping. (Non-members can spend $35 or more to receive free shipping; otherwise, it adds $5.55.) That's $4 under our mention from four weeks ago and the lowest total price we could find by $6. This battery pack features an LED status bar and dual outputs to charge two devices at once.