7.2volt 1500mAh 11Wh Ryobi 1311145, 1400668 Battery for Power Tools HP721K, 1311145, 1400668, HP61K Battery Type: Ni-Cd / Color: Black / Weight: 455.70 g Voltage: 7.20V (Compatible with 7.40V) Capacity: 1500mAh / Rate: 11.00 Wh Remarks: Only Charge with Ryobi 4400100 AC Adapter. Please ensure the product(s) fits the brand, model, part number and dimension of your device.