The JVC SWIT BN-S8823 7.2V Lithium Ion Battery that works with the JVC GY-HM100/HM150 camcorder. The battery has a four-level LED indicator, so you can tell on sight roughly how much power remains before you attach it to the camera. The BN-S8823 is equivalent to JVC's BN-VF823 battery.
The BN-S8823 also has a 7.2V pole DC output that can be used to power the SWIT S-2010 on-camera LED light and the camera simultaneously. When used with the GY-HM100, the battery transmits the remaining power percentage and recording time. An intelligent circuit protects against abnormal current, voltage and temperature.