Just wanted to add that I have two Pulsetech XC-100's and they are garbage. I bought them because the Army does use Pulsetech in their tool kits (the big ones that you tow around) but unfortunately these XC-100s don't work properly. Pulsetech has discontinued the XC100 and is supposed to release something new.
One of them floats at 14.6 VDC indefinitely. The other does drop down to 13.2 VDC but doesn't seem to properly maintain a battery. My Ford's BMS state of charge, even after two 8 hour calibration periods during sleep mode, failed to rise up to 99%. My Battery Tender waterproof 800 mA will bring a car battery up to 99% SOC within 1 or 2 sleep period calibration periods, and these are the small Tenders aimed at motorcycle batteries. I have other half a dozen of these little chargers because I have a detached garage that will get below freezing in winter. They have worked great since 2006. I have one on each battery (riding mower, motorcycle, cars, etc...) I just wanted a desulfating charger which is why I gave the Pulsetech XC100s a try. I've noticed they tend to shut off during float mode at certain times.
The Battery Tender maintenance charge is 13.2 VDC at 50mA to 150mA or so to prevent parasitic drain. It never cuts off like some of the chargers that go to 14.2 -14.5 VDC and shuts down, then restarts. I had a charger that did that and killed one of my batteries over time.
I have a BatteryMinder 1510 on one AGM motorcycle battery that I've been testing. It seemed to make it start the cold blooded Ducati engine a bit stronger but the float voltage is higher than the smaller Tenders, at roughly 13.5 VDC
I am starting to think maybe the desulfation modes on these chargers are all a gimmick as i have yet to see any empirical testing that correlates actual desulfation occurring, other than sales pamphlets or sales testimonies from websites selling chargers.
