AD 56315124 Delta-Q 24V On-Board Battery Charger for Nilfisk-Advance Floor Scrubbers. 24V, 25A Delta-Q QuiQ on-board battery charger for many popular Nilfisk and Advance floor machines including, AquaPlus, AquaPlus AXP, Adphibian, Convertamatic Series (24D, 24C, 26D, 26C, 28D, 28C, 32D, 32C, including X24, X26, X28, and X32 Models), AX 651 Multi EDS, Vac Ride 3400 and 3400C, Advenger 2800ST, Advenger 3400ST, ES4000, BA 625, BA 725, BA 725C, BA 835, BR 755, BR 755C, and BR 855. One battery charger required per unit. This is not a stand-alone battery charger. This charger is found on the unit and is straight thru wired. Replaces Nilfisk Advance 56315124. Our Part Number AD 56315124. Also replaces NSS 24-9-127-1 (NSS 2625) and Clarke 40844A.