PoweraddDirect via Amazon offers Prime members the Poweradd Pilot 2GS 10,000mAh Dual USB External Battery Pack Charger
for $25.99. Coupon code "XBYIL4AZ" cuts it to $22.99
. (Non-members can spend $35 or more to qualify for free shipping; otherwise shipping costs $5.46.) With free shipping
, that's $47 off list and the lowest total price we could find for a 10,000mAh battery pack with Li-polymer batteries(most external battery packs use standard LI-ion batteries). It features lithium polymer , aviation aluminum body, dual USB for charging two devices simultaneously, and compatibility with a wide range of devices (including iPhone, iPad and Android phones and tablets).