Compatible with Ryobi 40V cordless power tools and corresponding 40V battery chargers
Works as a replacement for Ryobi 40V lithium-ion batteries: OP4040 (4.0Ah), OP40501, OP4050A1, OP4050A (5.0Ah), OP40601, OP40602, OP4060A1, OP4060A (6.0Ah), OP40201 (2.0Ah), and other applicable 40V models