Cannot communicate with battery
Canon Camera
Severity: MinorWhat Does This Error Mean?
This message means the camera cannot read the battery's communication chip. You can usually dismiss the warning and continue shooting. This commonly appears with third-party batteries that lack Canon's authentication chip.
Affected Models
- Canon EOS R5
- Canon EOS R6
- Canon EOS R3
- Canon EOS 5D Mark IV
- Newer Canon cameras
Common Causes
- Third-party battery without Canon's communication chip
- Dirty battery contacts
- Genuine Canon battery with damaged communication chip
- Battery grip interfering with communication
How to Fix It
-
Dismiss the warning — the camera will still work.
This is a warning, not a blocking error. The camera functions normally — you just will not see accurate battery percentage.
-
Clean the battery contacts.
Dirty contacts can prevent communication even with genuine batteries. Use a dry cloth on the gold contacts.
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Use a genuine Canon battery to eliminate the warning.
Only genuine Canon batteries have the correct communication chip. Genuine batteries show remaining percentage and shutter count.
Frequently Asked Questions
Can I keep using the camera with this warning?
Yes. The camera works normally — it just cannot read the battery level accurately. The battery indicator may show inaccurate or no percentage.
Do all third-party batteries trigger this warning?
Most do. Canon uses a proprietary communication chip. Some high-end third-party batteries (like Wasabi Power) include compatible chips, but most do not.