2007-2010 Kawasaki Ultra 250X/260X/260LX PWC Factory Service Manual, Page 383Get this manual
14-24 ELECTRICAL SYSTEM
Battery
3) When you do not use the watercraft for months: Give refresh charge before you store the watercraft and store it with the negative lead removed Give refresh charge once month during storage4) Battery lifeIf the battery will not start the engine even after several refresh chargesthe battery has exceeded its useful life Replace it (Providedhowever, the watercraft's starting system has no problem)
A WARNING
Keep the battery away from sparks and open flames during charging, since the battery gives off an explosive gas mixture of hydrogen and oxygenWhen using battery charger, connect the battery to the charger before turning on the chargerThis procedure prevents sparks at the battery terminals which could ignite any battery gasesNo fire should be drawn near the battery, or no terminals should have the tightening loosenedThe electrolyte contains sulfuric acid8e careful not to have it touch your skin or eyesIf touchedwash it off with liberal amount of waterGet medial attention if severe