2004 John Deer Buck Utility ATV 500, 500EX and 500EXT Service Manual, Page 156Get this manual
on some factors such as: Battery temperature: The charging time is increased as the temperature goes downThe current accepted by cold battery will remain lowAs the battery warms up, it will accept higher rate of charge7Disconnect battery charger8Test battery state of chargeUse hydrometer9Let battery settle for hour10.Allow gas bubbles to escape by lightly shaking battery11.Readjust electrolyte level State of charge: Because the electrolyte is nearly pure water in completely discharged battery, it cannot accept current as well as electrolyteThis is why the battery will not accept current when the charging cycle first beginsAs the battery remains on the charger, the current from the charger causes the electrolytic acid content to rise which makes the electrolyte better conductor and then, the battery will accept higher charging rate Type of charger: Battery chargers vary in the amount of voltage and current that they can supplyTherefore, the time required for the battery to begin accepting measurable current will also vary Unless this procedure is properly followed, good battery may be needlessly replacedA17E0LA