While I haven't had anything close to an overheating or fire problem - knocking on wood as I type this - Rhinodart's fire photos chill my spine. I've had as many as 7 maintainers going at once. Best of the ones I've bought were Schumachers & Duralast (AutoZone). This year I've just disconnected the 2 Road Runner batteries, but am running maintainers on the 2 later models that have computers.
