7.2V 1.5AH Ni-Cd Replacement for RYOBI HP721 HP721K Drill Battery 1311145 1400668 Voltage: 7.20V (Compatible with 7.40V)  Rate: 11.00 Wh Battery Type: Ni-Cd  Capacity: 1500mAh  Weight: 455.70 g Remarks: Only Charge with Ryobi 4400100 AC Adapter. Compatible Part Numbers: 1311145, 1400668 Please ensure the product(s) fits the brand, model, part number and dimension of your device.