If your Mars II or Mars II Pro is unable to be fully charged, please try these steps:

• Completely drain its battery first
• Try using a different working power adapter if possible
• Make a system recovery on the projector by inserting a pin into the reset hole on the back of the projector when it's plugged in. 

If this issue persists, please contact us for further assistance. Please make sure to mention that you have tried the listed steps so that our agents do not ask you to repeat these steps.