---
title: 'howto check Charging (Watt income) under Linux'
url: 'https://willifix.net/blog/howto-check-charging-watt-income-under-linux'
markdown: 'https://willifix.net/blog/howto-check-charging-watt-income-under-linux.md'
date: '2024-06-06'
description: 'Today my new Satechi USB-C Charger arrived https://www.amazon.de/dp/B09QRWDK7F The charger is much lighter than the one that came with my Asus Zenbook (ux6404vv) The charger has completed its first charging processes without any problems. Now I asked myself the question "charges the laptop at the…'
---

# howto check Charging (Watt income) under Linux

## [howto check Charging (Watt income) under Linux](https://willifix.net/blog/howto-check-charging-watt-income-under-linux)

    6th Jun 2024  

Today my new Satechi USB-C Charger arrived <https://www.amazon.de/dp/B09QRWDK7F>

[![New Charger](https://willifix.net/images/9/1/5/8/2/91582d4534de3c22e8b334fd2c2b99c3e7aabda4-satechi.jpg)](https://willifix.net/user/pages/03.blog/howto-check-charging-watt-income-under-linux/satechi.jpg)The charger is much lighter than the one that came with my Asus Zenbook (ux6404vv) The charger has completed its first charging processes without any problems. Now I asked myself the question "charges the laptop at the maximum possible speed?" The keywords are `Power Delivery` and `USB-C`

Of course, there are USB cables on the market that have a power indicator in the form of a display. But I didn't want to buy an extra cable for this and thought there must be a more elegant solution under Linux.

##### First try

My first Idea was to check it with the already well known upower-daemon. But a `upower -d` delivers no information about the current charging speed:

```
Device: /org/freedesktop/UPower/devices/battery_BAT0
  native-path:          BAT0
  vendor:               ASUSTeK
  model:                ASUS Battery
  power supply:         yes
  updated:              Mi 10 Apr 2024 21:21:27 CEST (27 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               charging
    warning-level:       none
    energy:              18.418 Wh
    energy-empty:        0 Wh
    energy-full:         71.284 Wh
    energy-full-design:  76 Wh
    energy-rate:         44.293 W
    voltage:             15.661 V
    charge-cycles:       32
    time to full:        1.2 hours
    percentage:          25%
    capacity:            93.7947%
    technology:          lithium-ion
    icon-name:          'battery-low-charging-symbolic'
  History (rate):
    1712776887  44.293  charging
    1712776857  17.096  charging
    1712776845  0.000   discharging
    1712776845  11.073  discharging
    1712776816  11.423  discharging
...
```

##### Second try

After a while of searching i found a helpful command that brings me closer to my goal:

```bash
 echo $(echo "scale=3; $(cat /sys/class/power_supply/BAT0/power_now) / 1000000" | bc -l) Watt
```

This command outputs the current delivered Power e.g **50W**. I will implment this in my Waybar Charging indicator Area. But thats another Blogpost ;-).

##### battop

A really good tool i have found while i was searching for this solution is battop. Have a look: ![RWill_2024-04-10%2021-57-42](https://willifix.net/user/pages/03.blog/howto-check-charging-watt-income-under-linux/RWill_2024-04-10%2021-57-42.png "RWill_2024-04-10%2021-57-42")

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