Yup, though I can't remember how long for. They really seem to care about customer service and the devices comes with a letter saying that they want to know if you have any problems at all with the product. I've never had any need to call their customer support but i get the feeling that they'll be pretty good.
Actually it's been so long I cannot remember. WOrks very well with smartphones, charges less quickly with tablets and if youu are using the tablet at the same time to watch videos, it just keeps the tablet at the same battery level.