HP laptops - Battery capacity always reported as 100%

###HP laptop models affected so far:
HP EliteBook 840G1/G2
HP EliteBook 850G1/G2
HP ProBook 650G1
HP EliteBook 8460p
HP EliteBook 8470p
HP 650 Notebook PC
HP ZBook 15 G1/G2

Battery capacity always reported as 100% by upower command in Ubuntu 16.04 LTS - 4.15.0-36-generic (tested with older kernels as well).
HP Support Assistant utility detects the correct capacity in Windows.

###Information collected from one of the laptops:
HP EliteBook 8460p - battery CC06XL - 4910mAh

################################################################
### upower -d

Device: /org/freedesktop/UPower/devices/line_power_AC
  native-path: AC
  power supply: yes
  updated: Tue 02 Oct 2018 01:39:35 PM CEST (21 seconds ago)
  has history: no
  has statistics: no
  line-power
    warning-level: none
    online: yes
    icon-name: 'ac-adapter-symbolic'

Device: /org/freedesktop/UPower/devices/battery_BAT0
  native-path: BAT0
  vendor: Hewlett-Packard
  model: Primary
  serial: 00824 2012/06/09
  power supply: yes
  updated: Tue 02 Oct 2018 01:39:39 PM CEST (17 seconds ago)
  has history: yes
  has statistics: yes
  battery
    present: yes
    rechargeable: yes
    state: fully-charged
    warning-level: none
    energy: 48.9348 Wh
    energy-empty: 0 Wh
    energy-full: 49.2156 Wh
    energy-full-design: 49.2156 Wh
    energy-rate: 0 W
    voltage: 12.475 V
    percentage: 99%
    capacity: 100%
    technology: lithium-ion
    icon-name: 'battery-full-charged-symbolic'
  History (charge):
    1538480376 99.000 fully-charged
    1538480375 0.000 unknown
  History (rate):
    1538480375 0.000 unknown

Device: /org/freedesktop/UPower/devices/DisplayDevice
  power supply: yes
  updated: Tue 02 Oct 2018 01:39:35 PM CEST (21 seconds ago)
  has history: no
  has statistics: no
  battery
    present: yes
    state: fully-charged
    warning-level: none
    energy: 48.9348 Wh
    energy-full: 49.2156 Wh
    energy-rate: 0 W
    percentage: 99%
    icon-name: 'battery-full-charged-symbolic'

Daemon:
  daemon-version: 0.99.4
  on-battery: no
  lid-is-closed: no
  lid-is-present: yes
  critical-action: PowerOff

################################################################
### acpi -V

Battery 0: Unknown, 99%
Battery 0: design capacity 4557 mAh, last full capacity 4557 mAh = 100%
Adapter 0: on-line
Thermal 0: ok, 0.0 degrees C
Thermal 0: trip point 0 switches to mode critical at temperature 128.0 degrees C
Thermal 1: ok, 43.0 degrees C
Thermal 1: trip point 0 switches to mode critical at temperature 128.0 degrees C
Thermal 1: trip point 1 switches to mode hot at temperature 99.0 degrees C
Thermal 2: ok, 42.0 degrees C
Thermal 2: trip point 0 switches to mode critical at temperature 128.0 degrees C
Thermal 3: ok, 29.0 degrees C
Thermal 3: trip point 0 switches to mode critical at temperature 128.0 degrees C
Thermal 3: trip point 1 switches to mode passive at temperature 55.0 degrees C
Thermal 4: ok, 45.0 degrees C
Thermal 4: trip point 0 switches to mode critical at temperature 128.0 degrees C
Thermal 4: trip point 1 switches to mode passive at temperature 105.0 degrees C
Thermal 5: ok, 41.0 degrees C
Thermal 5: trip point 0 switches to mode critical at temperature 128.0 degrees C
Cooling 0: Processor 0 of 10
Cooling 1: Processor 0 of 10
Cooling 2: LCD 0 of 20
Cooling 3: x86_pkg_temp no state information available
Cooling 4: Processor 0 of 10
Cooling 5: Processor 0 of 10
Cooling 6: intel_powerclamp no state information available

################################################################
### cat /sys/class/power_supply/BAT0/uevent

POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_STATUS=Unknown
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CYCLE_COUNT=0
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=10800000
POWER_SUPPLY_VOLTAGE_NOW=12475000
POWER_SUPPLY_CURRENT_NOW=0
POWER_SUPPLY_CHARGE_FULL_DESIGN=4557000
POWER_SUPPLY_CHARGE_FULL=4557000
POWER_SUPPLY_CHARGE_NOW=4531000
POWER_SUPPLY_CAPACITY=99
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=Primary
POWER_SUPPLY_MANUFACTURER=Hewlett-Packard
POWER_SUPPLY_SERIAL_NUMBER=00824 2012/06/09

Has anyone experienced such a problem?
Any ideas?

Thank you very much!

Best regards,
Svetoslav