There are several out there, but this is the one I use:
Schumacher SSC 1500A-CA
The Schumacher SSC-1500A Ship 'n Shore SpeedCharge Charger is a versatile, fast and efficient 12-volt battery charger/maintainer suitable for use with a variety of lead-acid battery types used in everything from tractors, motorcycles, stand-up PWCs and snowmobiles, to those found in cars, trucks, RVs and boats. It features fully automatic microprocessor control; automatic multi-stage charging allowing for ease of use; three charge rates: 2-amp, 10-amp and 15-amp; and the ability to choose the type of battery being charged. Additional features include a built-in voltage tester, a desulfation mode,
a retractable handle and clamp/cable storage compartment.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW