[. . . ] If liquid comes in contact with your skin, wash immediately with soap and water, then neutralize with lemon juice or vinegar. If liquid gets into your eyes, flush them with clean water for at least 10 minutes, then seek immediate medical attention. Following this rule will reduce the risk of serious personal injury. BPL-1820 / BPL-1815 18V LITHIUM-ION BATTERY OWNER'S OPERATING MANUAL BPL-1820 BPL-1815 Always mention the above model numbers when communicating with us regarding battery pack. [. . . ] n If the charge indicator light glows green, the battery pack is fully charged. n If it glows yellow, it has a usable charge remaining but will soon require recharging. n If it glows red, the battery requires recharging as indicated by the fuel gauge symbols on top of the battery. CHARGE INDICATOR LIGHT FUEL GAUGE BUTTON charge them until the green LED on the front of the charger comes on. If the charger does not charge the battery pack under normal circumstances, return both the battery pack and charger to your nearest Authorized Service Center for electrical check. TO CHARGE n Use battery pack only with the recommended charger. Make sure the power supply is normal household voltage, 240 volts, AC only, 50 Hz. n Make sure the latches on each side of the battery pack snap into place and the battery pack is secured in the charger before beginning operation. n Place the battery pack in the charger aligning raised rib on the battery pack with the groove in the charger. n Press down on the battery pack to be sure contacts on the battery pack engage properly with contacts in the charger. n Do not place the charger and battery pack in an area of extreme heat or cold. NOTE: The charger and battery pack should be placed in a location where the temperature is more than 10°C but less than 38°C. n The battery pack will become slightly warm to the touch while charging. n After charging is complete, the green LED will remain on until the battery pack is removed from the charger or charger is disconnected from the power supply. n When batteries become fully charged, unplug the charger from the power supply and remove the battery pack. n To remove the battery pack from the charger, depress the latches on each side of the battery pack. BPL-1820 GREEN = FULL CHARGE YELLOW = RED = USABLE CHARGE REQUIRES REMAINS BUT WILL RECHARGING SOON REQUIRE RECHARGING Fig. [. . . ] Also, never touch both terminals with metal objects and/or body parts as short circuit may result. Failure to comply with these warnings could result in fire and/or serious injury. BATTERIES These batteries have been designed to provide maximum trouble-free life. Handling of these batteries, especially when wearing rings and jewelry, could result in a serious burn. [. . . ]