I don't think that this alone can explain the difference we're seeing, but one thing that comes to my mind is the power consumption of the WiFi module. If you'r

I don't think that this alone can explain the difference we're seeing, but one thing that comes to my mind is the power consumption of the WiFi module. If you're in position to be able to use 2.4GHz networks instead of 5GHz ones, that should bring power consumption down a bit. One more thing to try may also be WiFi power saving - it's not enabled by default yet since our testing has shown that it can cause troubles and significantly limit the bandwidth with some access points, but you may want to try checking if you're lucky enough to be able to use it already: `sudo iw dev wlan0 set power_save on`