Use coupon code BWL3X to get 30% discount (-$22.80 and final price $53.19 at the moment).
This is the most powerful solar charger in Blitzwolf range. It’s capable of delivering up to 3.8A of current (it full sun) which is enough to charge at full speed high power devices (high-end smartphones or tablets). Even smaller Blitzwolf panels can charge smartphones in cloudy day so this should easily power more demanding tablets. Solar cells from SunPower provide unsurpassed conversion efficiency over 23.5%
Blitzwolf chargers offer best value/cost ratio on the market and quality is very good.
At the moment the most cost effective version is 2A BW-L2 15W for $17.99 - see here: 15W version deal
28W version is the most recent so more reviews can be seen on BlitzWolf® 15W 2A BW-L2 and BlitzWolf® 20W 3A BW-L1 versions.