Build your own Makita tool kit with the 18V (4.0 Ah) Lithium-Ion Battery and Rapid Charger Starter Pack (T-04307). Makita offers over 350+ cordless tools that utilize 18V lithium-ion batteries, most available as -inchbare tools-inch (tool only, no batteries or charger included). Pick up the Makita Battery and Rapid Charger Starter Pack, then purchase the 18V -inchbare tools-inch you need to get the job done. It's an ideal way to start building a Makita LXT Cordless System. Makita 18V Lithium-Ion Batteries resist self-discharge, so they're ready for use even after long periods of storage. The Makita DC18RC Charger is a smart-charging system that communicates with the battery during the charging process to monitor current, voltage and temperature. This advanced charging technology helps optimize battery life and deliver a faster charge. In addition, the Charger has a built-in fan to cool the battery for faster and more efficient charging, even in hot weather conditions.