Using your Makita BL1840BSC2 Starter Pack is easy. First, charge the 18V LXT Lithium - Ion 4.0Ah batteries using the included DC18SD charger. It takes about 90 minutes for a full charge. You can check the charge level using the L.E.D. indicator on the battery. Once charged, insert the battery into your Makita Star Protection - marked tool. Remember, these batteries are only compatible with tools with the Star Symbol™ or a Yellow Battery Receiver. For 36V (18V X2) LXT tools, you'll need to use two of these batteries. When using the tools, the Star Protection Computer Controls™ will protect them from overloading, over - discharging, and overheating. As for maintenance, store the batteries in a cool, dry place. They resist self - discharge, but it's still a good idea to charge them every few months if not in use. The charger has a built - in fan to cool the battery during charging, which helps with battery life. The outer case of the battery is impact - resistant and has a shock - absorbing inner - liner, but try to avoid dropping or hitting the battery hard. This product comes with a 3 - year limited warranty, so if you have any issues, contact the manufacturer.
