12 Volt 234 Amp AGM battery. Fits Clarke Fusion 20, Fusion 20T, Ultra Speed 20/20T and Nilfisk Advance Advolution 20B, Advolution 20BT, Advolution 24B, Advolution 24BT, BU800 20B, BU800 20BA, BU800 20BAT, BU800 20BT, BU800 24B, BU800 24BA, BU800 24BAT, BU800 24BT, RSW 37, Terra 3700B, Whirlamatic UHSB 20 and Viper Fang 20HD, Fang 24T, Fang 26T, Fang 28T, Fang 32T (Viper models must use Dual Pro charger 24 Volt with this battery)
Fits Nilfisk Advance 41023A (alt # 41023a)