Is there any battery indication? Hollyland Tech November 30, 2020 02:49 Updated The battery voltage display will be on the OLED screen. When the Voltage is less than 6.8 V, it is suggested to exchange the battery to get the system to work normally. Related articles How to power on the device ? How long will the battery last ？ What are the differences between the STANDARD and ENHANCED version of MARS 300 PRO? How to power on the MARS 400S Pro? Why there is no video output when recording 4K ? How to set them up when multiple sets of MARS 300 PRO are used at the same location ? Comments 0 comments Article is closed for comments.