Sony NP-FS11 Info-Lithium Battery (3.6v, 1140 mAh)

Small and lightweight, Sony's Lithium-ion batteries can be charged or discharged at anytime without developing memory effect. This means they never lose their ability to hold a full charge. They also display remaining battery time on the LCD as well as in the viewfinder by continuously communicating with the camcorder. InfoLithium battery packs have a built-in micro processor that accurately calculates remaining battery life in minutes.