Came with no instructions but I am not worried because it is just a charger just like when you plug it into your computer. I try to never let it charge longer than 3 hrs. I bought the twin pack battery's compatible with samsung galaxy note. It always took at least 3 hours for a full charge. Havent tried the batts out yet cuz they accidentally packed the wrong item. CS was very nice and immediately shipped some batterys. I also wrote a question about the LED light asking does it change color or what when it is fully charged.
- How did the image on site compare with the actual product? Great
- Was the product free of any manufacturer defects? Yes
- Please tell us about the quality of the product. Seems to be solid enough