I've noticed this only a few times, and it doesn't always happen, but
there isn't enough data to form a pattern.

Fedora Workstation 28
kernel varies but mainly I use Rawhide kernels to catch bugs

[    0.000000] DMI: HP HP Spectre Notebook/81A0, BIOS F.40 02/26/2018

Battery is 100% charged. Computer is powered off via GNOME power
button icon thingy. Unplug power cord. Go to bed. Morning I plug power
back into the laptop and boot, and the battery icon indicates
charging, click on that icon and it reports it's charging the batter,
will take 40 minutes until full (80%).

So how the heck is the battery losing 20% when the laptop is powered
off? I have in the past couple weeks left the laptop overnight in
suspend to RAM mode, unplugged from power, and in the morning it's 90%
charged, which makes some sense I guess even though that still seems
like a lot of loss. But 20% powered off makes no sense.

The first time this happened I was suspicious of my own memory: OK
maybe I left it in suspend even though I'm 99% certain I powered it
off, but which is more likely, that I'm being spacey or that the
laptop discharged 20% overnight while powered off? But this time I am
certain it was powered off.

Anyway, it's been charging a bit before I ran this:

[chris@f28h ~]$ upower -i /org/freedesktop/UPower/devices/battery_BAT1
  native-path:          BAT1
  vendor:               Hewlett-Packard
  model:                PABAS0241231
  serial:               41167
  power supply:         yes
  updated:              Thu 17 May 2018 08:42:18 AM MDT (45 seconds ago)
  has history:          yes
  has statistics:       yes
    present:             yes
    rechargeable:        yes
    state:               charging
    warning-level:       none
    energy:              27.412 Wh
    energy-empty:        0 Wh
    energy-full:         31.5161 Wh
    energy-full-design:  38.115 Wh
    energy-rate:         6.7067 W
    voltage:             8.743 V
    time to full:        36.7 minutes
    percentage:          86%
    capacity:            82.6869%
    technology:          lithium-ion
    icon-name:          'battery-full-charging-symbolic'
  History (rate):
    1526568138    6.707    charging

[chris@f28h ~]$

Pretty weird.

Chris Murphy
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