This RYOBI 18V ONE+ Lithium-Ion HIGH PERFORMANCE 2.0 Ah & 4.0 Ah Battery provides up to 4X more runtime, 30% more power, and runs cooler compared to our standard lithium-ion batteries to provide long-lasting reliability and better performance in over 300 ONE+ Products. This HIGH-PERFORMANCE battery also features the most advanced on-board battery electronics that monitor voltage, temperature, and current to extend the life of the battery. When you pair this HIGH-PERFORMANCE battery with any ONE+ HP tool, advanced technology allows them to communicate to provide the best performance possible that powers through heavier applications and protects against overloading and overheating. It performs in extreme weather temperatures and is engineered to be impact resistant. This battery features an integrated LED fuel gauge to always check your battery charge. Charger sold separately. Comes in bulk packaging. You will receive (1) 2.0 Ah HP battery and (1) 4.0 Ah HP battery.