Amazon has the RAVPower Element 10400mAh External Portable Charger for $24.99. When you enter the coupon code: LCT9QZN3 the price drops to only $19.99 Prime shipped. (non members will need to pad the order to $35 or above to avoid shipping charges.) That’s half off the list price and the lowest we’ve seen in months.

It can charge all iPhones four to five times, a Galaxy S3 three times, or an iPad / iPad 2 once. It has LEDs to display just how much juice you’ve got left. A reliable lithium polymer core ensures quality, supplying you with more than 500 charge cycles during the course of its life.

It received 4.5 out 5 stars from over 1,000 Amazon customers.