Last time I used our motorhome we hooked up to the site mains but had no 12v power to anything,interior lights etc.Checked the leisure battery and it was discharged.Dont know if the problem is the zig x7 charger (it looks like the original so is about 15 years old) or the battery has just given up the ghost.Am tempted to a buy new charger (believe the X7 has been superceded by x70) But dont really want to pay £100 plus for a charger only to find it was the battery,any suggestions welcome.