2004-2005 Kawasaki STX-15F Jet Ski Factory Service Manual., Page 338Get this manual
ELECTRICAL SYSTEM 14-23 Battery
Initial harge
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If using recommended battery charger, follow the charger 's instructions for newly activated sealed batteryKawasaki-recommended chargers ti Yuasa 1.5 Amp Automatic Charger te te9
If the above chargers are not available, use equivalent one
Charging rates