Hi i just wanted to know how many cells the 4ah battery pack has and what the minimum voltage the 4ah battery pack should drop to after being used and the red light on the mower lights up ? Fully charged the voltage on my 4ah battery is showing 58.3 volts is this also correct ?I would like to know this as there is no way of knowing from the standard charger or the battery as to what percentage of charge is on the battery. I would like to store the battery with 30% percent charge immediately after using. (And not wait for the battery to do this.)Thanks a lot .