The 0820-0004 is a 2V/25Ah 1-cell Rechargeable Battery features a lead-acid technology. It features stud terminals. There is no need to limit the inrush current to the battery during constant voltage charging. The low internal resistance of EnerSys CYCLON single cell allows for large inrush current without damage. Since not all of the charge returned is accepted to replenish the electro-chemical potential, a good rule of thumb to use is that the charge returned should be 105 to 110% of the capacity delivered on the previous discharge.