Using older kernels with newer OS

Using older kernels with newer OS

I've got Ubuntu 20.04 running on a Thinkpad E490s. My top priority is battery life. Given the capacity of the battery is only 85% left, I get at least 8 hours on kernel 4.18 and only 6 .5 hours with the newer kernel 5.8. What are the pros and cons of using an older kernel with a newer OS?

submitted by /u/johannalexander
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