KTM 690 SMC R EU 2015 Owner's Manual page 120

14 ELECTRICAL SYSTEM
Info
Even when there is no load on the battery, it still loses power steadily.
The charging level and the method of charging are very important for the service life of the battery.
Rapid recharging with a high charging current shortens the battery's service life.
If the charging current, charging voltage and charging time are exceeded, electrolyte escapes through the safety valves. This
reduces the battery capacity.
If the battery is depleted from starting the vehicle repeatedly, the battery must be charged immediately.
If the battery is left in a discharged state for an extended period, it will become over-discharged and sulfate, destroying the battery.
The battery is maintenance-free, which means that the acid level does not need to be checked.
Preparatory work
–
Switch off all power consumers and switch off the engine.
–
Remove the seat. ( p. 75)
–
Remove the battery. ( p. 113)
118