KTM 690 SMC Owner's Manual page 112

MAINTENANCE WORK ON CHASSIS AND ENGINE
Info
Even if there is no load on the battery, it loses power every day.
The charge state and the type of charge are very important for the service life of the battery.
Fast recharging with a high charge current shortens the battery's service life.
If the charge current, the charge voltage and the charge time are exceeded, electrolyte escapes through the breathing holes. The
battery capacity is then reduced.
If the battery is discharged from starting, it must be recharged immediately.
If it stands for a long time in a discharged state, the battery becomes over-discharged and sulfated, and then it is destroyed.
The battery is maintenance-free, i.e., the acid level does not have to be checked.
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Switch off all power consumers and switch off the engine.
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Remove the battery. x ( p. 107)
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