Replacement battery for Suzuken Kenz ECG 305. Specifications: 2000mAh, 12V, Ni-MH. Compatible with: Suzuken Kenz ECG 305, Suzuken Kenz ECG-305, ECG-601, Cardico 601. Replaces: Kenz Cardico 10HR-AAU. Kenz Cardico replacement battery designed for Medical devices. Simple plug-and-play replacement requiring no modification.