PowerSmart 7.2Volt 15Ah Ni-Cd Drill 1311145 1400668 battery for RYOBI HP61K, HP721, HP721K, RY721, RY721K2 Power Tools(Only Charge with Ryobi 4400100 AC Adapter) Remark: Charge with Ryobi 4400100 AC Adapter. || Compatible P/N: 1311145, 1400668 Battery Type: Ni-Cd Voltage: 7.20V Capacity: 1500mAh Color: Black Dimension: 90.80 x 57.50 x 105.00 mm||Weight: 513.14 g||1 year warranty! Please ensure the product(s) that you are going to buy fits the brand, model, part number and dimension (mentioned above) of your device.