[emeritus]

I have an early 1970's vintage battery charger that I still use occasionally. I think it must have an old type rectifier, but haven't had the back off as it is rivetted on. On its 12V setting, it gives 13.5V open circuit when measured with a moving coil multimeter, and will charge a 12V lead-acid battery up to 15V if left for long enough. Its specified mains voltage is 240VAC, and our mains voltage these days has consistently been 235V whenever I have checked. I use it with a lamp board to regulate the charging current to suit my various 12V lead-acid batteries when I periodically cycle them as it has a higher end voltage than the other more modern electronic chargers that I have.