Charging Information For Lead Acid Batteries
"Lead acid charging uses a voltage-based algorithm that is similar to lithium-ion. The charge time of a sealed lead acid battery is 12–16 hours, up to 36–48 hours for large stationary batteries. With higher charge currents and multi-stage charge methods, the charge time can be reduced to 10 hours or less; however, the topping charge may not be complete.
Lead acid is sluggish and cannot be charged as quickly as other battery systems."
this thread hurts my head, lead is dead for a hybrid.