I bought this system when it first came out. No one knew that I took a good 8hrs for it to take on it's initial charge, so out of the box it useless. If you do not maintain the battery like a laptop, your battery will not hold a sufficient charge. The system gets overheated and sometimes the battery fails due to the heat. Now that I have had it over a year, it does not keep a charge. Cool concept, but the technology is not there yet.