This kit features 2 trigger-forward built- in LED lights that illuminates the work area. Its ergonomic shape fits like a glove with even pressure and easy control. The soft grip handle provides increased comfort on the job, and the Makita lithium-ion battery provides longer run time, 5x lower self discharge (for any time), and 16 firm holding contact terminals (for constant high power). The 30-minute rapid optimum charger communicates with the battery"s built in memory chip throughout the charging process to optimize battery life by actively controlling current, voltage, and temperature and has a built-in fan to cool the battery to produce more lifetime work. The charger earned the Energy Star label for meeting the strict energy-efficient guidelines set by the US environmental Protection Agency (EPA) and US Department of Energy (DOE).