Today only, Woot Sellout offers the Duracell myGrid 1800mAh Rechargeable USB Charger 2-Pack for $14.99. With $5 for shipping, that's $10 per charger and tied with the best total price we could find for just one of the 1150mAh versions. Each charger features a 1800mAh Li-ion battery, up to 100 hours of backup power, and is USB, Micro-USB, and Mini-USB compatible.