Not being tethered by a power cord is a massive advantage when using cleaning machines and the powerful NX300 frees you from the tether. It will fit a wide range of Numatic machines and delivers 300Wh giving the machines plenty of power, an extensive research and development programme utilising the latest battery technologies has resulted in a newly developed 30 cell design delivering a 60% increase in available energy. Run time depends on the individual machine but in all cases the recharge time to 80% is just 1 hour and 2 hours sees it fully charged. Recharge life has been tested and found to be up to 2500 cycles. Please note, charger and charging cable are sold separately - code FA651 and 912365.