I am wondering of battery live difference between S10 with Exynos and S10 with Snapdragon 855? I guess it will be huge... Are you willing to test it?

I believe the battery life issue is due to the difference between the Wifi Adapter of the S10 and Wifi Chipset of the test router. The S10 have used Wifi 6 adapter BCM4375 from Broadcom, while the router EA8500 have used Wifi 5 (ac) chipset IPQ8064 from Qualcomm. This difference could have affected the performance because the Wifi 6 draft have not been finalized yet, and 2 companies traditionally used different approaches to build the chip. Therefore, the way Broadcom using to design the new adapter might not have the regular path as Qualcomm had done. Additionally, Wifi 6 needs the compatible router support to work properly. The Broadcom adapter had backward compatibility with wifi ac; but of course, it did not fully optimized for ac, and it would be likely to use the Broadcom pathway.