Sturdy construction metal case battery charger in metal case for regular use. Suitable for 6 and 12 volt car and motorcycle batteries. Charging rates of 12 amp RMS (fast charge) and 3 amp RMS (trickle charge). Protected against reverse polarity, short circuit and thermal overload. Automatically switches to float charge when battery is fully charged. The analogue meter shows the charging status. Suitable for petrol engines up to 4,000cc and diesel engines up to 3500cc.