How to recognize new battery doors

Hi there, I just replaced my Vector 2 pedals with Rally RK200. First ride was good and values, especially L/R distribution within my experience of 48/52. Second ride showed a worse distribution 0f 45/55 which I can't accept. I'm sure that my power distribution is well within the first numbers. This was actually the reason why I exchanged the Vectors because they showed even 27/73.

So of course, my suspicion goes to the battery system, since this used to be a major weak point for those pedals.

The pedals are one week old (in my posession) and they came with FW 4.1. So how can I tell if I have the new battery doors?

Thanks and Regards.