The 18V Lithium-Ion 4-Port Charger (model DC18SF) offers several advantages for cordless tool users. It has a compact size that is ideal for job site or shop use, and will accommodate up to four 18V Lithium-Ion batteries at one time for increased efficiency and less downtime. (Batteries sold separately.) The DC18SF will charge two 18V LXT® 3.0 Ah batteries in 60 minutes, and four 18V LXT® 3.0 Ah batteries in 120 minutes. The charger will also accommodate 18V Compact Lithium-Ion 2.0 Ah batteries, with a 50-minute charge time for two batteries and up to 100 minutes for four batteries. It is compatible with all Makita 18V Lithium-Ion slide-style batteries. The DC18SF has a compact design at just over 17 in. long, and is ideal for a job site gang box or shop environment. The Charger communicates with the battery's built-in chip throughout the charging process to optimize battery life by actively controlling current, voltage and temperature. The result is faster battery charging and a more efficient job site or workshop.