these are the specifications of my charger >>>input 230v 50hz~85w norm,108w15/15mins >>>output auto on/off 4.2A Continuos,6a 15mins max regulated charge voltage at maximum ,with automatic on 14.5v +- 0.1 (on 100% charge) 13.9v +- 0.1 (on permanent float) The battery is a heavy duty deisel battery by EXIDE [and thats it! no more battery details]