Makita DC18RD 18V Lithium Ion Dual Port Rapid Optimum Charger with USB Port CST Ambush Blade tension adjustment for adjustable P400270850045 Blade tension adjustment for adjustable blade tracking The Kenda Bear Claw EVO is the next step in the "EVO" lution of the Bear Claw Makita DC18RD 18V Lithium Ion Dual Port Rapid Optimum Charger Built in USB port for charging portable electronic devices Makita rapid optimum charger communicates with the battery's built in chip throughout the charging process to optimize battery life by actively controlling current and temperature Built in fan circulates air through the battery during the charging process to cool the battery for faster charge time Optimizes battery life by actively controlling current