Sony NP-F970L L-Series Rechargeable Battery Pack £150.99
Features: Power: 7.2 V, 47.4 Wh, 6,600 mAh STAMINA super-long battery life Lithium-ion Cells with No 'Memory Effect' Highly efficient, compact and light-weight Built-in Microprocessor communicates with camera, and accurately indicates remaining battery time in minutes. Environmentally-friendly: 100% free of lead, cadmium and mercury Sony recommends you use only InfoLITHIUM batteries with