Better Than Nothing
The day before I left for a plane trip, I stopped by Crutchfield to get noise cancelling headphones. As an afterthought, I bought this recharger to use enroute, if necessary, to buy some time until I could use my wall charger at my destination. I didn't need it, but tested it a little at the place I stayed (20 min.). I don't remember how much it charged then, but I still had 3 of the 4 lights lit on the charger when I got home. Ten days later (today), I still show 3 lights (75% recharger capacity). So the product holds a charge for a long time. Just for the heck of it, I connected the recharger to my Android phone, at 53% charge, for one hour. The result: the phone's charge got to 88%, and the recharger was down to 2 lights. In other words, it cost the recharger 25% to give the phone a 35% charge. This also conflicts with the company's specs, saying the recharger totally charges a phone in one hour; my experiment predicts almost 3 hours for a 100% charge.Compared to other portable rechargers, it's the smallest, lightest option out there. Unlike a few competitors out there, it doesn't get hot while it's being charged or charging a phone. So, was this worth the price I paid? For me, using only for a smartphone to buy some possibly precious time, yes.
Pros: Light, small, doesn't heat up, holds charge for long time, price
Cons: Long charging time