If you use both an internal battery pack and an external battery connected to the DC IN connector at the same time, you can avoid breaks in operation due to dead batteries.
When an external battery begins to fail and an internal battery pack is also used
Remove the DC output cable from the DC IN connector. The power source will switch to an internal battery pack.
5 When an external battery begins to fail and an internal battery pack is not used
First load the camcorder with a fully charged internal battery pack, then remove the DC output cable of an external battery from the DC IN connector. The power source will switch to the internal battery pack. To use an external battery again, connect a fully charged external battery to the DC IN connector before unloading the internal battery pack. The power source will switch to the external battery.
Continuous operation when operating with only an internal battery pack
First, connect a fully charged external battery to the DC IN connector, then change an internal battery.
Notes
•When an internal battery pack is loaded and an external battery is connected to the DC IN connector, the external battery is always used as the power source.
•There may be some noise on the video signal at the instant the power sources are switched.