Newegg offers the RAVPower Deluxe 14,000mAh Portable External Battery in Black or White, model no. RP-PB13, for $39.99. Coupon code "EMCPBPE92" cuts that to $34.99. With free shipping, that's tied with our June mention and is the lowest total price we could find today by $5. (For further comparison, we also saw it bundled with a 3,000mAh battery pack for $5 more a month ago.) The battery pack features a built-in flashlight, auto-off, and compatibility with a wide range of devices (including the iPad, iPhone, and Android phones and tablets). Deal ends August 11.