EOS R5 Mark II - battery showing Change or Charge Battery

[fragle2112]

Had the R5 Mkii now for 5 months 

pre latest firmware had no issues with the above message ( shot ok in Serbia and Poland over last month )

upgraded firmware last week to latest available and the message appeared on all 4 batteries this morning in UK ( the temperature was warmer in uk than Serbia / Poland ) 

never had this issue with Mki or R3 

[Waddizzle]

What model batteries are you using?  I know Canon introduced new batteries for their newest cameras.  

[fragle2112]

Using the latest LP-E6P batteries as recommended by Canon 

[jalessi]

I have been experiencing the same problem with the R5 II with the LP-E6P batteries and without the BG-R20 battery grip.  Always in cold weather but not always easy to reproduce.  I put in a report to Canon months ago and it seems like there are lots of reports of this online.  I am a wildlife photographer and have missed several shots because of this. 

[jalessi]

Just curious, are you using a third-party charger or the OEM one? I typically use a third-party charger but am thinking that I should switch back to the OEM one or charge the camera to see if that has any effect on the issue.

[Waddizzle]

I had suspected that he was using third party batteries.  Or, they were exposed to freezing temperatures inside luggage during a flight.