Replacement battery for ECG-1200. Specifications: 4000mAh, 14.8V, Li-ion. Compatible with: ECG-1200, ECG-1200G, Kangtai ECG-1200, Kangtai ECG-1200G. Replaces: CONTEC 855183P-4S. CONTEC replacement battery designed for Medical devices. Designed to match the original manufacturer’s performance.