My Macbook Air (2018) Retina battery has depleted within 130 cycles. I was running Windows via Bootcamp in heavy load, letting it discharge fully and charge repeatedly. If I unplug from power source the system shuts down. Battery status is showing as "replace now". Coconut Battery test shows that current capacity is 9 % of design capacity. The system when connected to AC power turns on but it is running extremely slowly. When checked activity monitor, Kernel_Task shows 300 % of CPU. Apple Diagnostics test revealed one issue PFM006 - SMC issue. I tried resetting SMC, PRAM. Issue still exists. My questions are
- Is PFM006 (SMC) related to Battery. If battery is replaced, will this issue go away? Else could it be a faulty temperature sensor?
- Is the Kernel_task issue related to PFM006 (SMC)?
- Could there be any relation between these three events (PFM006, Battery, Kernel_Task)?
- Does apple diagnostics cover all sensors? If PFM006 is the only error returned, does that mean all sensors are working fine?
- How is it possible for a battery to depleted within 130 cycles when it is guaranteed as 1000 cycles?
Note: All apple service centers are closed due to COVID-19. So trying to find the issue online.