Works for all RYOBI 40-Volt lithium-ion tools (string trimmer, lawn mower) and chargers, including RY40200 RY40403 RY40204 RY40530 RY40460 RY40180 RY40250, and OP403A OP401 ZROP401 OP400A RY40440
Here’s a rephrased version to avoid semantic duplication:
Substitute options for the Ryobi 40V lithium battery include: OP4050A, OP4015, OP4026, OP40201, OP40261, OP4030, OP40301, OP4040, OP40401, OP4050, OP40501, and OP40601. This battery is compatible with a variety of Ryobi 40V power tools, such as: RY40200, RY40403, RY40530, RY40204, RY40250, RY40402A/R40402, RY40460, and RY40180.
Built-in Protection against overcharging, over discharge, over current, provides short circuit protection and steady voltage circuit, all of these lengthen battery life.
Come with 3 years product quality service from date of purchase, and 24 hours' friendly customer service!