Battery Helpers

Probably one of the most persistent Battery Myths: the battery needs to be calibrated every now and then! Rather nonsense (see linked article). You don't need an app to calibrate your device's battery. That rather happens as a side-effect: that is, always when your battery ran low until the evening, and you fully charged it in one uninterrupted run (over night) – so those apps are mostly „snake oil“ to obtain ad revenue (see: What’s it all about those modules apps contain?). But for those who insist, there are some calibration apps available – which all require root (mostly to remove the batterystats.bin which holds the "juice consumed by app" data):

NoAd Battery Calibrator [ROOT] (4.3@48) 0 $Contains no trackers known to us \o/$ LastUpdate: 2021-09-17 Github
Easy Battery Calibration (3.6@5,283) 2 1 LastUpdate: 2020-07-01

Identify Battery Consumers

2025-06-12

Though Android comes with a built-in tool to show battery usage and consumers, this is often mis-interpreted and not even complete. It gives you raw indicators, true – and if there's an app nibbling at your battery all day long permanently with „greater hunger“, it will certainly show up here. For a deeper analysis, however, one often needs tools revealing more details:

Usage Timelines Free (4.3@1,635) 5 1 LastUpdate: 2016-11-04
BBS (4.3@24; ~EUR 2.50) 20 $Contains no trackers known to us \o/$ LastUpdate: 2023-06-30 Github; XDA Home
GSam Battery Monitor (4.1@73,186) Ǥ 17 7 / GSam Battery - Root Companion (3.7@1,539) 3 $Contains no trackers known to us \o/$ LastUpdate: 2015-12-17 / GSam Battery Monitor Pro (4.1@8,490; ~EUR 2.50) Ǥ 11 4
SystemPanel 2 (4.1@2,724) Ǥ 15 1 LastUpdate: 2018-10-15 Test 2/2017; Data Extraction 5/2019
SystemPanelLite Task Manager (3.7@12,652) 8 $Contains no trackers known to us \o/$ LastUpdate: 2017-03-27
Battery Mix (バッテリーミックス) (3.1@13,872) Ǥ 20 3

Other Battery Helpers

2025-06-12

AccuBattery (4.6@542,986) Ǥ 17 8 Video Intro 7/2018
Battery Guru: Battery Health (4.4@27,442) 8 3
BatteryBot Battery Indicator (4.2@59,775) 3 $Contains no trackers known to us \o/$ LastUpdate: 2022-03-24 / BatteryBot Pro (4.5@6,422; ~EUR 3.00) 6 $Contains no trackers known to us \o/$ LastUpdate: 2021-12-07 Github; Vorstellung 3/2019; Battery monitoring tool
Battery Charge Notifier (4.2@2,063) 3 $Contains no trackers known to us \o/$ LastUpdate: 2021-03-15
BatteryHub (4.2@66) 12 1 LastUpdate: 2019-10-04 Github; battery monitor
Ampere (4.1@316,838) Ǥ 12 2 show how many mA your device uses/gets fed
Battery Dr saver+a task killer (4.1@119,836) Ǥ 24 4 LastUpdate: 2016-11-30
DU Battery Saver (4.1@113) 33 17 LastUpdate: 2019-03-11
Safe Charger (4@36) 4 $Contains no trackers known to us \o/$ LastUpdate: 2021-01-23 Github; notifies you when charge reaches 85%
Battery Charge Limit [ROOT] (3.8@2,910) 2 $Contains no trackers known to us \o/$ LastUpdate: 2018-10-19 Github; Video Demo 5/2019; stop charging at a set limit (default: 80%)
Ampere Meter (3.6@15,460) Ǥ 10 5 LastUpdate: 2023-05-25
Carat (3.3@2,733) 14 $Contains no trackers known to us \o/$ LastUpdate: 2018-03-27 personalized recommendations for improving your battery life
DrainGuard TRIAL (3.2@49) 9 LastUpdate: 2012-12-30 monitors usage and alarms you in case of "jumps"
Batteryminder (3@4,410) 10 $Contains no trackers known to us \o/$ LastUpdate: 2020-03-03
Healthy Battery Charging (0@0) 4 $Contains no trackers known to us \o/$ Github; keep your phone charging between 40% and 80%
Plus Plus Battery (0@0) 3 $Contains no trackers known to us \o/$ Github
Battery Notification (0@0) 7 $Contains no trackers known to us \o/$ Github; battery status in the notification bar
Battery Charge Limiter (BCL) (0@0) 4 $Contains no trackers known to us \o/$ Github
Advanced Charging Controller (ACCA) (0@0) 2 $Contains no trackers known to us \o/$ LastUpdate: 2021-09-02 Github; Advanced Charging Controller; needs root

Further Readings:

Rubrik Battery Savers
Rubrik System Info
General
- 7 Common Android Battery Problems and How to Fix Them (2/2023)
- Swollen Battery? Expensive to Replace? Run Your Smartphone Without a Battery! (11/2022)
- Is Fast Charging Bad for Battery Life? (4/2022)
- Garantiebestimmungen für Akkus in Smartphones (6/2014 - 2/2020)
- Known Android Myths (9/2012)
Battery Calibration

2025-06-23

IzzyOnDroid

Battery Calibration

Identify Battery Consumers

Other Battery Helpers