2001 Ski-Doo Factory Shop Manual Volume One, Page 246Get this manual
Section 06 ELECTRICAL Subsection 04 (BATTERY)
Time required to charge battery will vary depending some factors such as: Battery temperature: 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 charge State of charge: Because the electrolyte is nearly pure water in completely discharged battery, it cannot accept current as well as electrolyteThis is the reason 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, time required for the battery to begin accepting measurable current will also vary