ULTIMAXX Replacement Battery for Sony FV100 - 4900 mah (x2) Short Description The NP-FV100 Lithium-Ion Battery Pack works with the same cameras as the Sony NP-FV100 (not compatible with Sony HXR-NX70U). This replacement battery pack features a capacity of 3300mAh and 7.4V of output power. Small and lightweight, lithium-ion batteries can be charged or discharged at any time without developing memory effects.