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, the recommend charge rate should be kept around 2.25-2.30V/cell and shall not exceed 2.40V/cell. An AGM compatible charging system is required. The A5 has transitioned from a 24 Ah battery to a 11 Ah. Both batteries have the same footprint but the 11 Ah battery is nearly half the weight and smaller in height.(See Figure 38 and Figure 39.)