I find when I am using my laptop on battery, I have to keep watching out for Chrome draining the battery - tomorrow I may try using Edge to help!
Having this same issue in Chrome on GNU/Linux. Heavily loads the CPU just for a normal game of chess or bughouse, no engine analysis running, nothing.
I find when I am using my laptop on battery, I have to keep watching out for Chrome draining the battery - tomorrow I may try using Edge to help!