Replacement battery for Robo Cylinder Controller RCP2-CG-RSA-A-PM-O. Specifications: 2500mAh, 4.8V, Nickel. Compatible with: Robo Cylinder Controller RCP2-CG-RSA-A-PM-O. Replaces: IAI HHR-21AHF4G3, IAI AB-4. IAI replacement battery designed for PLC devices. Built to OEM specifications for reliable performance.