18 V battery set with lithium batteries + 2 x 4.0 Ah and quick charger. Lithium + battery technology sets the standard for operating time, performance and durability. The battery level indicator informs the user by pressing a button about the current battery charge status. IntelliCell. Monitors each cell individually, maximizes operating time per battery charge, and extends battery life. With the R18DD3 battery drill and a + 4.0 Ah lithium battery, up to 1240 4x32 mm screws can be processed. With the R18CS wireless circular hand saw and a + 4.0 Ah lithium battery, plywood up to 88 meters 13 mm can be cut. The result depends on the battery, the device and the application. Compatible with all Ryobi 18V ONE + battery devices.