Replace Battery Models: OP4050A, OP4015, OP4026, OP40201, OP40261, OP4030, OP40301, OP4040, OP40401, OP4050, OP40501, OP40601 CompatibleTools Model: (NOTE: NOT fit RY40002, RY40408) RY40180, RY40200, RY40022, RY40201A, RY40202, RY40204, RY40400, R40402, RY40402A, RY40403, RY40403A, RY40411, RY40502A, RY40503, RY40511, RY40601A, RY40LM30, RY40190, RY40430, RY40620, RY40460, RY40250, RY40770, RY40580, RY40610A, RY40210B, RY40240, RY40440 Fit for Ryobi Charger Model: OP400, OP400A, OP401, OP403, OP403A, OP404A, OP406A, ZROP401 Warning Tips: 1. Don't charge immediately after the battery runs out. Let the battery cool down 10-20 minutes. 2. Always remove battery pack form your tool when you are assembling parts, making adjustments, cleaning or when not being used for an extended time. 3. If you don't plan on using the Power Tool Battery for a month or more, store it in a clean, dry,