Lithium Iron Phosphate (LiFePO4) Batteries

[GregOConnor]

On a split of charging. Would it be feasible to just use a standalone true charge 20 or 40 for the start batteries only. I picked up a true charge 40 to use when the bus is docked. Was thinking that a true charge 20 or a other brand light weight charger-only-automatic-device would be better since start batteries only need to be maintained at voltage since they get full recharge within 30 min of driving and are usually parked full charged and not used until a start is prompted.