The Milwaukee M18 FUEL Brushless Reciprocating Sawzall Saw with 5Ah Battery & Charger Kit includes (1) 48-59-1850 Milwaukee M18 5.0Ah Starter Kit & (1) 2821-20 M18 FUEL Brushless Reciprocating Sawzall Saw. The Milwaukee M18 REDLITHIUM XC5.0 Starter Kit delivers up to 2.5X more runtime, 20% more power and 2X more recharges than standard lithium-ion batteries. The lithium-ion battery pack features superior pack construction, electronics, and performance providing users more work per charge and more work over pack life than any battery on the market. The rechargeable battery also delivers users with 5.0 Amp-hours of runtime. Each battery pack is durably built for heavy-duty use, runs cooler, and performs in climates below 0 degree F/minus 18 degree C. This protection routes water away from the electronics and out of the battery pack, extends the users' battery run-time and life by minimizing heat, and prevents pack failures from vibration or drops. Built-in REDLINK Intelligence protects the battery from overloads, preventing users from damaging their cordless power tools in heavy-duty situations, while the discharge protection prevents cell damage. An integrated temperature Management system and individual cell monitoring help to maximize battery life. The Milwaukee M18 FUEL SAWZALL Recip Saw is the next generation of legendary performance and durability, designed for the toughest applications on the job site. The M18 FUEL SAWZALL is the fastest cutting reciprocating saw in its class and leverages a POWERSTATE Brushless Motor to provide users with 3,000 SPM with a 1-1/4 in. stroke length for faster material removal. REDLINK PLUS electronics ensure maximum performance under stress as well as protection from overloading, overheating, and over-discharging. The M18 REDLITHIUM XC5.0 Battery Pack (not included) delivers users up to 2.5X runtime and provides more work per charge and more work over the life of the pack than competitive batteries.