Librem 14 sudden crash when unplugged

i am searching because i remember @nicole.faerber posted once, how to switch cpu to lower Watt mode, it will decarase powerconsumption, as it lowers some frequencies on board.
when i find it i will post it, i will as one of affected users, to switch his cpu to lower power mode (put power Cap) and test stability of the system.
i know it’s not an solution, but i am interested if instabilities are not connected with power regulator. (there are many of them on board.)

everyone affected may you try

echo 10000000 > /sys/devices/virtual/powercap/intel-rapl/intel-rapl:0/constraint_0_power_limit_uw
echo 15000000 > /sys/devices/virtual/powercap/intel-rapl/intel-rapl:0/constraint_1_power_limit_uw

and then do your test run???
that will reduce powerusage on cpu -5W
defaults are

echo 15000000 > /sys/devices/virtual/powercap/intel-rapl/intel-rapl:0/constraint_0_power_limit_uw
echo 20000000 > /sys/devices/virtual/powercap/intel-rapl/intel-rapl:0/constraint_1_power_limit_uw