DJI O4 Relay LED & Battery Status Guide: Linking, Charge Level & Troubleshooting
The O4 Relay uses separate LED patterns for internal battery level, battery level during charging and device linking status. The manual's tables are concise, so this page reorganizes them into one quick diagnostic reference.
Quick Answer: Press the power button once to check current battery level. The battery display is divided into eight ranges from 88%-100% down to 0%-12%. During charging, the display uses four ranges: 0%-50%, 51%-75%, 76%-99% and 100%. For linking status, alternating green/red means linking, solid green means linking successful and solid red means not linked.
Check battery level with one press
Press the power button once to display the current internal-battery level.
Battery level ranges
| Range |
|---|
| 88%-100% |
| 76%-87% |
| 63%-75% |
| 51%-62% |
| 38%-50% |
| 26%-37% |
| 13%-25% |
| 0%-12% |
Battery level during charging
The charging display groups battery state into 0%-50%, 51%-75%, 76%-99% and 100%.
Linking status LEDs
| Pattern | Meaning |
|---|---|
| Green and red blink alternately | Linking |
| Solid green | Linking successfully |
| Solid red | Not linked |
If the relay remains solid red
Move into the linking workflow rather than treating solid red as a failed antenna or failed relay. Check the linking steps and firmware version. If the app reports an aircraft-model mismatch, use the remote-controller USB-C connection and follow the app prompt to switch the model.
Parts & Equipment Referenced in This Guide
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Source and revision note
Primary source: DJI O4 Relay User Guide v1.0 (2024), English LED Patterns section.
