Merging upstream version 1.43.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+<!--startmeta
+custom_edit_url: "https://github.com/netdata/netdata/edit/master/collectors/proc.plugin/integrations/power_supply.md"
+meta_yaml: "https://github.com/netdata/netdata/edit/master/collectors/proc.plugin/metadata.yaml"
+sidebar_label: "Power Supply"
+learn_status: "Published"
+learn_rel_path: "Data Collection/Linux Systems/Power Supply"
+message: "DO NOT EDIT THIS FILE DIRECTLY, IT IS GENERATED BY THE COLLECTOR'S metadata.yaml FILE"
+endmeta-->
+
+# Power Supply
+
+
+<img src="https://netdata.cloud/img/powersupply.svg" width="150"/>
+
+
+Plugin: proc.plugin
+Module: /sys/class/power_supply
+
+<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" />
+
+## Overview
+
+This integration monitors Power supply metrics, such as battery status, AC power status and more.
+
+
+
+This collector is supported on all platforms.
+
+This collector supports collecting metrics from multiple instances of this integration, including remote instances.
+
+
+### Default Behavior
+
+#### Auto-Detection
+
+This integration doesn't support auto-detection.
+
+#### Limits
+
+The default configuration for this integration does not impose any limits on data collection.
+
+#### Performance Impact
+
+The default configuration for this integration is not expected to impose a significant performance impact on the system.
+
+
+## Metrics
+
+Metrics grouped by *scope*.
+
+The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.
+
+
+
+### Per power device
+
+
+
+Labels:
+
+| Label      | Description     |
+|:-----------|:----------------|
+| device | TBD |
+
+Metrics:
+
+| Metric | Dimensions | Unit |
+|:------|:----------|:----|
+| powersupply.capacity | capacity | percentage |
+| powersupply.charge | empty_design, empty, now, full, full_design | Ah |
+| powersupply.energy | empty_design, empty, now, full, full_design | Wh |
+| powersupply.voltage | min_design, min, now, max, max_design | V |
+
+
+
+## Alerts
+
+
+The following alerts are available:
+
+| Alert name  | On metric | Description |
+|:------------|:----------|:------------|
+| [ linux_power_supply_capacity ](https://github.com/netdata/netdata/blob/master/health/health.d/linux_power_supply.conf) | powersupply.capacity | percentage of remaining power supply capacity |
+
+
+## Setup
+
+### Prerequisites
+
+No action required.
+
+### Configuration
+
+#### File
+
+There is no configuration file.
+#### Options
+
+
+
+There are no configuration options.
+
+#### Examples
+There are no configuration examples.
+
+