RYOBI introduces the 18-Volt ONE+ Lithium-Ion 4.0 Ah High Capacity Battery (2-Pack). These batteries feature superior electronics and performance to allow you to work stronger and longer with all 18-Volt ONE+ tools. These batteries deliver superior runtime, power, and performance when paired with RYOBI Brushless tools. They have a durably constructed frame for impact protection and have an on-board fuel gauge so you can easily check your charge at any time. These batteries can be paired with over 125 tools from RYOBI 18-Volt ONE+ lineup. Backed by the RYOBI 3-Year Manufacturer's Warranty, these batteries include an operator's manual. Charger sold separately.