The
A5 uses Concord RG-series Valve Regulated Lead Acid (VRLA) 12V Absorbent Glass Mat (AGM) aircraft battery. The RG series is constructed with non-removal vent valves-no addition of electrolyte or water required.
AGM batteries are sensitive to overcharging and ICON recommends maintaining them using a trickle-charger such as the BatteryMINDer® Model 128CEC2-AA-S5. See the Concorde RG Series Component Maintenance Manual, l 5-0171, Table 101 and Page 107, for additional information and requirements.