1995-1997 Kawasaki 750ZXi-900ZXi Jet Ski Repair Manual., Page 21Get this manual
GENERAL INFORMATION 1-15
(VI) Precautions 1) No need of topping-up No topping-up is necessary in this battery until it ends its life under normal useForcibly pryinfl off the sealinal plug to add water is very dangerousNever do that2) Refreshing charge has If an engine will1 not start, it indicates the battery been dischargedGive refresh charge for to 10 hours with charge current shown in the specification (see the Electrical System chapter)When fast charge is inevitably required, do it following precisely the maximum charge current and time conditions indicated on the battery
CAUTION
This battery is designed to sustain no unusual deterioration if refresh-charged according to the method specified aboveHowever, the battery's performance may be reduced noticeably charged under conditions other than given abovechargeNever remove the sealling plug during retresh by chance an excessive amount of gas is generated due to overcharging, the safety valve operates to keep the battery safe