20000mAh portable charger for $18
by Mark Frauenfelder from on (#T9DS)
This is the best price I've seen on a 20000mAh USB portable charger. It's $36, but if you use the promotion code Y4DFT2KK at checkout you can buy it for $18 (at least it was $18 the last time I checked.) I bring a 20000mAh charger when I travel and it keeps my iPhone 6 Plus fully charged for a few days with heavy use.