17. BATTERY/CHARGING SYSTEM MXU 500 IRS BATTERY CHARGING · This model comes with a maintenance free (MF) battery. Remember the following about MF batteries. Use only the electrolyte that comes with the battery. Use all of the electrolyte Seal the battery properly Never open the seals again · For battery charging, do not exceed the charging current and time specified on the battery. Using excessive current or extending the charging time may damage the battery. SPECIFICATIONS ITEM SPECIFICATIONS Capacity 12V 18 Ah Current leakage 0.5 Ma max. Voltage (20°C/68°F) Full charged 13.0 13.2 V Battery Needs charging Below 12.3 V Charging current Normal 1.8 A/5 10 h Quick 9 A/1 h Alternator Capacity 310 400 W/5000 rpm Charging coil resistance (20°C/68°F) 0.1 0.3 17-3