S-8BG6 is a 7.2V, 37.4Wh Li-ion DV battery that fully compatible with Panasonic VW-VBG6. It can display remaining power percentage and remaining recording time on Panasonic HMC series 71/151 cameras. In addition, the S-8BG6 has a 7.2V pole DC output socket for SWIT LED light S-2010, allows to power camera and light simultaneously; and a 4-level LED indicator to give you a view of remaining power before mounting to camera. The intelligent circuit has multiple protections of abnormal current, voltage and temperature.
For more information see this link
Max output power
Max output current
Over current protection
Panasonic AG-HMC71, 151, etc.