Hey I brought myself a 1995 micra Hollywood. I thought it just needed a new battery replaced it but next day was flat again. I got my multimeter out tested battery with engine running and getting 13v ish. When I turned engine off the volts drop massively down to about 4v when I disconnect battery it goes back up to around 11v. Ive tried removing fuses 1 at a time and theres stilll a drain on battery. Does anyone have any idea what it could be. Thanks in advance ben