4-29E1) Check the electrolyte level at least oncea month. Fill to the manufacturer’s rec-ommended level when necessary. Topup only with distilled water (or pure de-ionized water suitable to use in batter-ies).2) Always keep the battery in a good stateof charge. Installing a voltmeter will helpyou monitor your battery. If you will notuse the boat for a month or more,remove the battery from the boat andstore it in a cool, dark place. Completelyrecharge the battery before using it.3) If the battery will be stored for longerthan a month, check the specific gravityof the fluid at least once a month andrecharge the battery when it is low.NOTE:@Consult a Yamaha dealer when charging orre-charging batteries.@