Cobra Digital DV500 - Manual (Page 6)

6
Preparation
Battery Installation
Your DV requires lithium battery (3.7V). To insert the battery in the camcorder:
1. Slide the battery bolt to open battery door.
2. Load the lithium battery correctly as the polarity (+ and -) marked on the battery cover.
3. Close battery door.
Notes:
If you do not intend to use the device for a long time, remove the battery from your DV.