useless it worked great at first but as i [SEP] after owning this for less than a year it does not hold a charge useless it worked great at first but as i used it multiple times i noticed that it didn t hold a charge as long from the last charge it slowly developed into not holding a charge long enough for minute of use even when the green light was on even if you have it plugged in it still does not have full power and is very slow i thought this would be a good product but it s just trash now i don t think i will ever buy from this brand again