There is really only one thing that changes ph of your water, and that’s flow rate.
Sure, higher electricity in the cell will give a higher pH but it will also be a less stable output because fundamentally it’s the minerals in the incoming water that facilitate the ionization and output pH.
Electric ionizers have all sorts of buttons and gizmos to increase pH, but flow rate is all that is really needed for normal water. Natural ionizers have only one control; flow rate, and once set, they hardly ever need changing. (Not all natural ionizers have easy flow control. Some rely on adjusting the tap water pressure.) Only a few electric ionizers have inbuilt flow control, and it’s an important advance. It means your pH won’t change if you turn your tap on less than last time.