Sure as Hell, CONSTANT CURRENT CHARGING will hurt a battery. Constant current is only done under meticulously supervised conditions to rectify damage caused by an incorrectly applied recharging period in which the batteries are abused by undercharging. To wit...
Read the LIFELINE manual about RECOVERY
Read the BCI protocol for flooded lead acid battery equalization.
Constant current 14 batteries in series is how shysters attempt to recover one or two batteries and sell those that survive with a days long return for credit.
Voltage ASSUMES impedance
Current does not
This is why a standard transformer battery charger is now illegal in "California". The idiot worker selects high, sets the timer dial on hold, then sneaks around to the back and rolls a quarter-pounder. When he comes to, he has a hazardous waste site.
