Sony NP-QM71D Super Quick High Capacity InfoLithium Camcorder Battery for DCRDVD301 & HDRSR1 Allows up to 250 minutes of continuous recording time One-touch display gives you power level information any time, anywhere Features a storage capacity of 2760 mAh Resists memory effect and will not prematurely reduce your recording time Includes an on-board LED battery remaining indicator