Boron 1.4.2 battery charging issue

[Paul_M]

Particle ruined the Boron charging code in recent update; please see at least two recent threads about this.
E.g.:

PMIC calls now catastrophically crash Boron due to Particle software update

Update: Today, I tried to confirm that the workaround detachInterrupt(LOW_BAT_UC) returns the PMIC to previous Charging Performance since I have extensive test results for Boron Charging. While the workaround does enable charging, It Does Not compare to previous results. 1.4.2 fails miserably when compared to the actual PMIC performance under earlier firmware. Both Solar and Utility Powered when using the USB connector. Since the Li-Po Charging issues are Chronic verses Acute, the typical u…