Linux 下查看电池容量准么

[nrtEBH]

我用了个 gnome 插件 Vitals 电量里能看到 capacity 但经常飘忽不定 在 80 多到 96 之间徘徊 才用了一年的电池
有什么比较准确查看电池健康度的方式吗

[LiangBryan]

```
cat /sys/class/power_supply/电池名称/energy_full # 查看当前最大容量
cat /sys/class/power_supply/电池名称/energy_full_design # 查看设计时的最大容量
```

[L4Linux]

大概是掉到 80%开始充电，充到 96%停止。

[vcn8yjOogEL]

读取的是电池报告的容量, 如果电池固件不行那就不准

[nrtEBH]

@LiangBryan 从数字上看 Vitals 读的就是这个 那可能还是和底层固件相关了

[duzhuo]

```
$ sudo tlp-stat -b  system 19:42:56
--- TLP 1.6.1 --------------------------------------------

+++ Battery Care
Plugin: generic
Supported features: none available

+++ Battery Status: BAT1
/sys/class/power_supply/BAT1/manufacturer = LGC
/sys/class/power_supply/BAT1/model_name = AP19B8M
/sys/class/power_supply/BAT1/cycle_count = 125
/sys/class/power_supply/BAT1/charge_full_design = 4683 [mAh]
/sys/class/power_supply/BAT1/charge_full = 4516 [mAh]
/sys/class/power_supply/BAT1/charge_now = 3608 [mAh]
/sys/class/power_supply/BAT1/current_now = 2384 [mA]
/sys/class/power_supply/BAT1/status = Charging

/sys/class/power_supply/BAT1/charge_control_start_threshold = (not available)
/sys/class/power_supply/BAT1/charge_control_end_threshold = (not available)

Charge = 79.9 [%]
Capacity = 96.4 [%]

```
不知道准不准