A person would remote into the laptop somehow and mess with ACPI settings to mess with your battery functions. It also messes with operating installations by affecting a memory source in CMOS.
In the kernel (I think v3 and above), ACPI actually using a space in CMOS and this can get disrupted. My battery would not charge at all and it would be at 0%.
I took a peek at acpi_cmos_rtc.c under the kernel source /drivers/acpi and on line 52 on v 3.13.7
It writes to CMOS for ACPI which I thought was odd. My windows OS does not have that problem. I had to wipe CMOS and reload the linux OS to recover it.