Compatible with Ryobi 40-Volt lithium-ion battery:

OP4050A, OP4015, OP4026, OP40201, OP40261, OP4030, OP40301, OP4040, OP40401, OP4050, OP40501, OP40601, OP40602,OP4075A, OP4080A.

Compatible with Ryobi lithium battery 40volt tools:

RY40180, RY40200, RY40022, RY40201A, RY40202, RY40204, RY40400, R40402, RY40402A, RY40403, RY40403A, RY40411, RY40502A, RY40503, RY40511, RY40601A, RY40LM30, RY40190, RY40430, RY40620, RY40460, RY40250, RY40770, RY40850, RY40610A, RY40210B, RY40240, RY40440. (Doesn't fit RY40002, RY40408)

Compatible with 40Volt Ryobi lithium battery chargers:

OP400, OP400A, OP401, OP403, OP403A, OP404A, OP406A, ZROP401