Need a Battery charger

I've got a snap on battery charger on wheels, that I bought probably 20-25 years ago. So far so good. Since Mom died we've been clearing things out of her house and garage so we can sell the house. I made sure to grab Dad's old Sears charger he bought when was probably 12 years old, late 70s/early 80s and gave it to my son since he was always using mine. Says Sears on it but id guess it's really an old Schumacher.