Makita BL1830-2 18-Volt 3.0 AH Battery, 2-Pack (Discontinued by Manufacturer) (Discontinued by Manufacturer) COLD TEMPERATURE BATTERIES: These batteries can function in temperatures as low as -4 Degrees Fahrenheit (-20 Degrees Celsius) CHARGER AND TOOL COMMUNICATION: Onboard chips allow these batteries to communicate with their power tool counterparts to optimize performance and lifetime when on the job 16 CONTACT TERMINALS: When working with heavy duty impact drivers, hammer drills, or saws, the last thing you want to have happen is to lose connection with the battery during high vibration applications. The number of contact pins in this battery enable it to provide constant, consistent power throughout these uses FAST CHARGING: When working with compatible chargers (DC18RC, DC18RD, DC18SF), these batteries can be fully charged in as little as thirty minutes IMPACT-RESISTANT: External battery impact resistance is built into this design. Shock absorbing liner and a sturdy polycarbonate structure enable these to hold up to the rigors of nearly any jobsite