I am extremely disappointed with this purchase. The price was attractive, but very poor quality. The round cable jack is not adapted to the battery whose load section is square so you have to tinker to maintain the connection to power recharging the battery, which once charged if not in use not return to zero after 2 days. So it's been 2 weeks since I batteries and I have still not had the use for when I want to use it, they are flat ........ :(