arch-wiki-md-repo/wiki/_content/english/Tp-battery-mode.md

All arch-wiki articles in markdown format, updated every two days.

tp-battery-mode is a module to easily switch your Thinkpad's battery charging mode to prolong battery lifetime using [tpacpi-bat](https://www.archlinux.org/packages/?name=tpacpi-bat) from the [AUR](/index.php/AUR "AUR").

## Contents

*   [1 Installation](#Installation)
*   [2 Features](#Features)
    *   [2.1 Prolong Battery Lifetime](#Prolong_Battery_Lifetime)
    *   [2.2 Reverting to default charging behavior](#Reverting_to_default_charging_behavior)

## Installation

Install the [tp-battery-mode](https://aur.archlinux.org/packages/tp-battery-mode/) package available from the [AUR](/index.php/AUR "AUR").

## Features

Your Thinkpad's default behavior is to start charging its battery as soon as it drops below 100% capacity and stop charging once it is at 100% capacity. Switching your battery charging mode changes these start & stop threshold. tp-battery-mode's default values can be found in `/etc/tp-battery-mode.conf`

```
START_THRESHOLD=85
STOP_THRESHOLD=90

```

These values mean that your battery will start charging once the capacity drops below 85% and stop charging once it has reached 90% capacity. This should prolong your battery's lifespan while still giving you ample charge for portable needs.

### Prolong Battery Lifetime

Switching to these new charging thresholds is as simple as:

```
systemctl start tp-battery-mode

```

To make sure that the change is persistent, enable the service. This will ensure that your charging mode is correct on boot:

```
systemctl enable tp-battery-mode

```

You can tailor the start/stop thresholds to fit your needs by modifying `/etc/tp-battery-mode.conf`. If you modify these values, you will need to restart the tp-battery-mode service otherwise the changes will not be reflected until you reboot.

**Note:** tp-battery-mode supports the T440's dual batteries however their charging thresholds cannot be changed independently.

### Reverting to default charging behavior

Sometimes you might want to charge your battery all the way to 100% If you wish to revert to the default Thinkpad charging behavior, you just need to stop the service:

```
systemctl stop tp-battery-mode

```

If you wish to revert to the default Thinkpad charging behavior completely, you will also need to disable the service:

```
systemctl disable tp-battery-mode

```