This charger is supposed to do lots of things according to Oxford. I had a transformer fail and effectively scrapping the charger and while the engineer was looking at it he said, I hope you didn't pay much for this. More effort goes into lighting the LEDs up than actually charging the battery, it is a basic cheap charger in a fancy box. Not impressed. Worked well for a while but the peace of mind it offers is no longer there. Cheating, lying, advertising that just isn't true.