if you still have those .DAT files for tests you did - like i asked above - can you post those files here?
Honestly I'm not entirely sure how to pull that and it's a bit more technical then I care to venture into. If you have to look that closely, its obviously not an improvement worth the time in my opinion. I don't see a .dat file on the SD card so I assume it requires some work to get, is it within the DJI app? I run several marketing companies so I have been looking into ways to extend overall battery life/flight time/long term battery health. 27 Minutes is great and impressive, I'm more worried about having to buy new batteries after XX amount of charges.