Used to be 18Volts. I run a 5.0 Amp hour 18Volt Ryobi battery drill battery with my DC CDI 2 race Ignitec. I think they must have lifted the Voltage...
Cheers Husa , i'll send an email just in case... if no luck i reckon a 25 will work good if i make up some new sliders so we can get a good clamp on...