Battery not detected and MacBook very slow
The system doesn’t detect the battery (I tried to change with a new battery, but with the same result, it doesn’t detect from system). Therefore the system works only if the plugged with AC adapter.
Pressing the battery tester on side for detecting the battery charge the LED’s doesn’t work (none lit).
Since it occurred, I detect an extreme slowness in open any folder or any other operations. I also tried to update the firmware, but the actual firmware was already updated.
I tried to reset the SMC and NVRAM, but without good results. The version of MAC OS installed is 10.15.2.
What can I try to fix this problem?
The screenshot of Coconut is the following:
the battery is not detected (there isn’t the icon in the top).