EP-5000SC: 1.2 volt 5000mAh rechargeable NiMH Sub-C size cell. Choose plain, or add Solder Tabs for $0.25 per cell (one tab welded to top of battery and one tab welded to bottom of battery. Handy for assembly applications). Battery dimensions: 1.75" tall x 0.88" diameter. Weighs approx. 2.15 ounces.