power_manager/tools/print_sysfs_power_supply_data

#!/bin/sh

# Copyright 2017 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Prints raw power supply information from sysfs. This is the input that powerd
# uses, and can be useful for debugging low-level battery or charger issues.

# Please don't use this script in tests. Just read the information that you need
# directly.

for ps in /sys/class/power_supply/*; do
  echo "${ps}"
  for f in "${ps}"/*; do
    base=$(basename "${f}")
    if [ ! -f "${f}" ] || [ "${base}" = uevent ] \
      || [ "${base}" = serial_number ]; then
      continue
    fi
    printf "  %-20s %s\n" "${base}" "$(cat "${f}")"
  done
done