Linux：使用upower命令查看电池信息

参考链接：
从 Linux 终端查看笔记本电池状态和等级的 5 个方法

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关于upower，本人了解也不是很深刻，下面只是做个记录，为方便以后查看。

查看upower命令的帮助：

[adams@~]$ upower --help
用法：
  upower [选项…] UPower tool

帮助选项：
  -h, --help           显示帮助选项

应用程序选项：
  -e, --enumerate      Enumerate objects paths for devices
  -d, --dump           Dump all parameters for all objects
  -w, --wakeups        Get the wakeup data
  -m, --monitor        Monitor activity from the power daemon
  --monitor-detail     Monitor with detail
  -i, --show-info      Show information about object path
  -v, --version        Print version of client and daemon

[adams@~]$ 

使用 upower -e ：

[adams@~]$ upower -e
/org/freedesktop/UPower/devices/line_power_AC
/org/freedesktop/UPower/devices/battery_BAT0
/org/freedesktop/UPower/devices/battery_BAT1
/org/freedesktop/UPower/devices/DisplayDevice
[adams@~]$

使用 upower -i 加对应电池信息：

[adams@~]$ upower -i /org/freedesktop/UPower/devices/battery_BAT0
  native-path:          BAT0
  vendor:               SMP
  model:                01AV459
  serial:               3572
  power supply:         yes
  updated:              2019年11月13日 星期三 10时37分41秒 (23 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               fully-charged
    warning-level:       none
    energy:              24.89 Wh
    energy-empty:        0 Wh
    energy-full:         24.9 Wh
    energy-full-design:  24 Wh
    energy-rate:         0 W
    voltage:             12.916 V
    percentage:          100%
    capacity:            100%
    technology:          lithium-polymer
    icon-name:          'battery-full-charged-symbolic'

[adams@~]$ 

如果是查看AC：

[adams@~]$ upower -i /org/freedesktop/UPower/devices/line_power_AC
  native-path:          AC
  power supply:         yes
  updated:              2019年11月13日 星期三 09时10分37秒 (5290 seconds ago)
  has history:          no
  has statistics:       no
  line-power
    warning-level:       none
    online:              yes
    icon-name:          'ac-adapter-symbolic'

[adams@~]$ 

upower的配置文件为：/etc/UPower/UPower.conf，其内容为：

# Only the system vendor should modify this file, ordinary users
# should not have to change anything.

[UPower]

# Enable the Watts Up Pro device.
#
# The Watts Up Pro contains a generic FTDI USB device without a specific
# vendor and product ID. When we probe for WUP devices, we can cause
# the user to get a perplexing "Device or resource busy" error when
# attempting to use their non-WUP device.
#
# The generic FTDI device is known to also be used on:
#
# - Sparkfun FT232 breakout board
# - Parallax Propeller
#
# default=false
EnableWattsUpPro=false

# Don't poll the kernel for battery level changes.
#
# Some hardware will send us battery level changes through
# events, rather than us having to poll for it. This option
# allows disabling polling for hardware that sends out events.
#
# default=false
NoPollBatteries=false

# Do we ignore the lid state
#
# Some laptops are broken. The lid state is either inverted, or stuck
# on or off. We can't do much to fix these problems, but this is a way
# for users to make the laptop panel vanish, a state that might be used
# by a couple of user-space daemons. On Linux systems, see also
# logind.conf(5).
#
# default=false
IgnoreLid=false
# Policy for warnings and action based on battery levels
#
# Whether battery percentage based policy should be used. The default
# is to use the time left, change to true to use the percentage, which
# should work around broken firmwares. It is also more reliable than
# the time left (frantically saving all your files is going to use more
# battery than letting it rest for example).
# default=true
UsePercentageForPolicy=true

# When UsePercentageForPolicy is true, the levels at which UPower will
# consider the battery low, critical, or take action for the critical
# battery level.
#
# This will also be used for batteries which don't have time information
# such as that of peripherals.
#
# If any value is invalid, or not in descending order, the defaults
# will be used.
#
# Defaults:
# PercentageLow=10
# PercentageCritical=3
# PercentageAction=2
PercentageLow=10
PercentageCritical=3
PercentageAction=2

# When UsePercentageForPolicy is false, the time remaining at which UPower
# will consider the battery low, critical, or take action for the critical
# battery level.
#
# If any value is invalid, or not in descending order, the defaults
# will be used.
#
# Defaults:
# TimeLow=1200
# TimeCritical=300
# TimeAction=120
TimeLow=1200
TimeCritical=300
TimeAction=120

# The action to take when "TimeAction" or "PercentageAction" above has been
# reached for the batteries (UPS or laptop batteries) supplying the computer
#
# Possible values are:
# PowerOff
# Hibernate
# HybridSleep
#
# If HybridSleep isn't available, Hibernate will be used
# If Hibernate isn't available, PowerOff will be used
CriticalPowerAction=HybridSleep