[Widely Compatible with Ryobi 18V ONE+ Tools] compatible with Ryobi 18V cordless tools and chargers, including popular models like P102, P108, P189, P197, and more [Long-Lasting 5.5Ah Battery Power] Each 18V lithium-ion battery offers 5.5Ah of capacity—delivering reliable power and extended runtime for most home and garden tools [Safe, Stable, and Smart Protection] Features built-in overcharge, over-discharge, overheat, and short-circuit protection for safe, worry-free operation. Made with premium lithium-ion cells [LED Fuel Gauge & Rugged Casing] Easily check battery status with the built-in LED indicator. Durable ABS casing resists wear, shock, —suitable for job sites and tough environments [2-Pack for More Efficiency & Less Downtime] Comes with two high-quality 5.5Ah replacement batteries—perfect for users who need backup power during long jobs.