plenty of different ones around , search on
fully automatic 12v battery charger
and take your pick.i have 2 of them an one of them i have modified the leads that connect to the battery.
i have cut the leads and put in bullet connectors similar to these
this allows me to change the connectors that goto the battery. i have have the standard battery clamps or swap to a hella power plug to charge a bmw or any others with a power plug fitted or make any other custom cable i want to attach to the charger