10B A T T E R Y C H A R G I N GA N D C A R ERechargeable batteries can last years with proper care. Mostimportantly, fully charge your battery:• before the first use• after each use• before storing• every 45 to 60 days when not in use.Using the 2.5-hour Fast ChargerNote: The charger will charge a fully depleted battery inapproximately 2.5 hours.1. Plug the power cord into the charger and then the wallsocket. The charger will conduct a self-diagnosis and thecharging indicator light (located on the back, upper-leftcorner of the charger) will illuminate green, then amber,and then back to green.2. Connect the charger cable to the battery. If the battery isnot fully charged, the indicator light will turn amber,signifying fast-charge mode. If the light flashes when youfirst plug in the battery, the charger is preparing an overlydischarged battery for fast charging.3. When the battery is fully charged, the indicator light willturn green and charging will shut off automatically.4. Unplug the charger from the battery and wall socket,grasping the connectors rather than the cables. (Leavingthe battery and charger connected indefinitely will not harmthe cells.)Battery InitializationUntil the battery has been charged and discharged up to tentimes, you may experience shorter than expected run timesas well as higher than normal charger and batterytemperatures.