Makita BL1850-2 18-volt LXT Lithium-Ion 5.0Ah Battery, 2-Pack- Discontinued by Manufacturer (Discontinued by Manufacturer) Provides up to 65% more run time per charge compared to the 18V 3.0Ah battery (BL1830) Compatible only with Star Protection tools, indicated by the Star Symbol and/or Yellow Battery Receiver under the tool Reaches a full charge in 45 minutes or less on the Makita Rapid Optimum Charger (sold separately) Battery delivers constant power and run time in extreme temperatures, even in winter (-4 F/ -20 C) Impact-resistant outer case and shock-absorbing inner-liner are engineered to protect the battery