This charger has been used for around 100 charges. Around charge 50, the voltage reading would not get above the teens when plugged into the wall, and would not charge the battery. After contacting Luna and being directed to the ebike forums, somebody suggested opening it up and adjusting the potentiometers. That 10 minute fix worked for a few months, but now is having the same issue. Will try again, but it would be nice to just have something that works all the time without fiddling. When it functions correctly, it works great and the features are spot on.