Internal battery discharging before external batt

Hello,

Previously my system was working fine with external battery discharging before using internal.

Now it seems to want to discharge internal battery first instead of external.

How can this be fixed?

PS: Have multiple external batteries giving same behavior. The reason I got multiple was to be able to use the system for longer hours but this issue is causing problems with my plan.
 
What was the previous OS?

What kind of device and what external batteries?
It was working fine earlier with the same setup of FreeBSD on a partition.

Device -
Thinkpad T480
with internal and external battery(ies ,have multiple)
 
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