Every battery charger I know of is a "pulse" charger. AC, High frequency, PWM, they ALL pulse. I drove beta units from milliwatts to high wattage. All the way to megaHz...
Sulfation has to be chemically recombined. Can't use a tuning fork to dissolve concrete. The energy used in vibrating electrons is the thing that does the work. kWh vs kWh. Concorde's Lifeline warantee says it is void if pulse charging is entertained on any of their batteries.