Sony
P-F970 L-Series Info-Lithium Battery Pack (6300mAh)
Never guess how much battery power you have left again.
InfoLITHIUM is a technology that enables a Lithium-ion battery to share data about its remaining capacity with compatible video equipment.
The amount of remaining battery life is indicated in minutes when the battery is used with Handycams using the infoLITHIUM system.