VCSEC family
VCSEC_a210_keyDeviceBatteryLow
Key fob battery low
What does the VCSEC_a210_keyDeviceBatteryLow alert mean?
Low battery detected on key device
What you'll see in your Tesla
- Key fob battery low
- See Owner's Manual to replace
What triggers it
If reported key voltage is below a temperature dependent threshold
When it clears
When accessory power turns off
Potential impact
Key will stop functioning soon
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.