I read that article all the way through and it seemed to me the opposite was true. They were only contraindicated in Lithium Batteries because they use a different Chemistry.
"PulseTech to the Rescue!
A few years back Pulse Tech patented a pulse frequency that would dissolve the crystalized sulfate and return it to its original form. And with that the first Battery Desulfator was born! The military was (and is) its primary customer. Their pulse frequency is a range from 22-28 KHz. That is roughly 22,000-28,000 pulses per second. The years of testing has produced empirical data that shows the effect on lead plates and validates their use as a battery desulfator."
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