Sunvalleytek via Amazon offers Prime members the RAVPower 3,200mAh Lipstick External Battery Pack
in five colors (Black pictured), model no. RP-PB08, for $12.99. Coupon code "GWSEABID" cuts it to $6.99
. Plus, Prime members bag free shipping
. (Non-members can spend $35 or more to qualify for free shipping; otherwise, it adds $6.22.) That's $4 under our May mention, $43 off list, and the lowest total price we've seen. It features a built-in flashlight and compatibility with a wide range of devices (including the iPad, iPhone, and Android phones and tablets).