As one of its daily deals, That Daily Deal offers the Pilot Electronics 5,200mAh Portable Battery Pack / Heat Pack in Camo for $18.49. Coupon code "BRINGTHEHEAT" cuts that to $9.98. With free shipping, that's $3 under our mention from last week and the lowest price we've seen. (It's the best deal now by $27.) It features variable heat settings from 109°F to 120°F and up to 3.5 hours of heat per charge. Deal ends January 22.