Five Of These In Series?

From the small amount that I've read, the initial charging of an empty depleted state takes special handling
After that the recharge from 11v to 14v is easily handled by any alternator or pure D.C. charger/power supply
You do not subject these to reverse polarity or high ripple
Should work well for high surge current needs
When paralleled with a battery bank they will be the same voltage as the batteries
If used as stand alone substitute for a 12v / battery, outside of a vehicle..
The use of a suitable D.C. to D.C. converter, that Will accept and use the tapering input voltage while outputting the needed voltage 12v or other voltage, will allow the use of almost all stored power
Drain it as low as you want while getting 12v out, say for a Cpap machine or a laptop
This is where you need the special recharge circuit, to limit the input current while bringing up the voltage
This is for protecting the input wiring and charger from high current over load demands, a totally deleted super cap bank, looks like a dead short to the avg power supply/charger