ABOVE THE STANDARD. RIDGID once again beholds the greatest battery to power up your tools, the 18V Lithium-Ion 4.0 Ah Battery Starter Kit. Up to 4X more run time compared to standard lithium-ion batteries. The 4.0 Ah battery gives professionals prolonged run time and more charges over its lifetime compared to standard lithium-ion batteries. SMART FEATURES. Make your power ups easier with the included 18V Charger that is compact and features a Smart Charging Indicator that will update the batterys charge status. Now you don't have to guess every minute of the day. ONE FOR ALL. Best of all, this 18V Lithium-Ion 4.0 Ah Battery Starter Kit is 100% compatible with all RIDGID 18V batteries, tools, and chargers, and with registration, this Lithium-Ion 4.0 Ah Battery Starter Kit is backed by the Industry Leading Lifetime Service Agreement. BEATING THE EXTREME. The battery is the best-in-class for extreme weather performance in temperatures as low as -4 degrees and up to 120 degrees F. Most importantly it offers upto 18 volts of power and 4 hours of battery capacity. SAVE MORE ENERGY. The charger can be wall mounted for a more organized storage option. It also decreases energy consumption with the Energy Saving Charger and maintenance Charging keeps the battery charged and maintains overall life. RIDGID 18V Lithium-Ion 4.0 Ah Battery and Charger Starter Kit