small and lightweight, sony's np-f970 info-lithium battery pack (6300mah) provides the advantages of lithium-ion, meaning it can be charged or discharged at anytime without developing memory effect. This means the battery never loses its ability to hold a full charge. The np-f970 displays remaining battery time on the lcd as well as in the viewfinder by continuously communicating with the camcorder. The battery lasts for up to 12 hours on a single full charge. Sony's info-lithium battery packs have a built-in micro processor that accurately calculates remaining battery life in minutes