A charge range
that suits you.
Choose high and low battery thresholds, then let a notification do the remembering.
THE ANDROID BATTERY COMPANION
Every percent.
Understood.
See how you charge.
Understand where it goes.
Take a little more control.
Android 9+ · Core monitoring needs no root
Contains ads & in-app purchases
01 Live charging readings02 Screen & sleep insights03 Thoughtful power controls
A PERCENTAGE IS ONLY THE START
Meet the rest
of the story.
Battery Watch turns your phone’s battery data into a view you can actually use. From the moment you plug in to the hours your screen stays off.
LIVE BATTERY MONITORPlug in.
Plug in.
See what happens.
Watch current, voltage, power and temperature as they change. Open a metric to explore its trend, or look back through your charge sessions.
- Live current in mA and calculated power in W
- Charging and discharging session history
- Capacity estimates and supported cycle readings
Readings depend on your device’s sensors. Advanced statistics may require Premium or a temporary ad unlock.
SCREEN & SLEEPScreen off.
Screen off.
Still curious?
See how much time your phone spends with its screen on, awake in the background, or in deep sleep. Give overnight drain some context.
- Screen-on and screen-off activity
- Deep-sleep and Doze insights
- Per-app usage with Usage Access
Persistent monitoring improves continuity. Historical screen and per-app insights need Usage Access.
OPTIONAL SHIZUKU / ROOTInsight, meet
Insight, meet
a little action.
Connect Shizuku or root to access automatic battery saver, Always-On Display controls and wake-lock tools. You choose the access you grant.
- Battery saver for configured screen-off conditions
- Restore the previous saver state on wake
- Inspect and manage app wake locks
Device support varies. Hardware charge limits require root and compatible charging controls.
TAKE A LOOK AROUND
The app.
Screen by screen.
Explore all eight screens. Swipe or use the arrows, then select a screen for a closer look.
Every degree.
Live temperature and trends. Advanced statistics need Premium or a temporary ad unlock.
Your limits. Your reminders.
Charge-level and temperature alerts. Premium or a temporary ad unlock required.
A little more control.
Optional Shizuku or root power tools. Device support varies.
When the screen goes off.
Screen time, awake time and deep sleep. Historical insights need Usage Access.
Make it yours.
Choose your theme, tracking level and supported power controls.
Look back at a session.
Explore session trends and average readings in one place.
Just a glance away.
A free temperature badge, with more widget layouts in Premium.
See what stays awake.
Inspect wake-lock activity with Shizuku or root on supported devices.
Actual app interface · Sample emulator data · Feature access varies by device and permissions.
SMALL HABITS. BETTER AWARENESS.
A heads-up.
Before you
forget.
Set charge-level and temperature alerts that fit your routine. Keep useful battery information close with home-screen widgets.
Custom alerts and premium widgets require the relevant unlock. Notifications must be enabled. Alerts are reminders; they do not stop charging.
A charge range
Temperature.
Out in the open.
Watch temperature trends and set alerts for the thresholds you choose.
START SIMPLE. GO DEEPER.
Your phone.
Your level of control.
Start with the essentials. Add access when you want more insight or more control. Battery Watch shows what your setup supports.
Just the app.
Live readings, battery temperature and charge-session tracking. A useful view without root.
No root requiredA fuller picture.
Allow Usage Access for per-app usage and historical screen insights. Enable persistent monitoring for continuity.
Optional permissionsHands on.
Use Shizuku or root for supported power-saving and wake-lock controls. Hardware charge limits need compatible root access.
Shizuku or rootFeature access and device permissions are separate. Some features also require Premium or a rewarded-ad unlock.
FIELD NOTES
A bit of battery
understanding.
Practical explanations for the questions behind the numbers.
Charging speed
What is your charger actually doing?
Make sense of mA, volts and watts, and compare charging sessions.
Read the field noteScreen & sleep
Where does the battery go overnight?
Understand screen-off activity, deep sleep and wake locks.
Read the field notePower controls
More control. Root optional.
See what Shizuku unlocks, and which features still need root.
Read the field noteBattery cycles
What counts as a battery cycle?
Device counts, older Android versions and the session deltas behind our estimates.
Read the field noteBattery health
Where does battery health come from?
The capacity calculation, saved readings and why the estimate changes over time.
Read the field noteWhat does Battery Watch do?
Battery Watch is a battery monitoring and power management app for Android 9 and newer. It shows live current, voltage, power and temperature, records charging and discharging sessions, and helps you understand screen-on use and sleep. Optional Shizuku or root access enables additional power controls.
Does Battery Watch need root?
No. Live battery readings and session tracking work without root. Per-app usage and historical screen insights require Usage Access. Controls such as automatic battery saver, Always-On Display and wake-lock management require Shizuku or root. Hardware charging limits require root and compatible device hardware.
Can it help me save battery?
Battery Watch helps you understand drain and adjust how your phone uses power. With Shizuku or root, it can enable battery saver when screen-off drain meets your configured conditions and restore the prior state on wake. Results depend on your device, apps and settings; it does not promise a fixed battery-life increase.
How accurate are charging speed and battery health readings?
Charging readings come from Android battery sensors. Reported power is calculated from battery current and voltage, so it is not a measurement of power at the wall charger. Capacity and health figures are estimates based on the data your device exposes. Some phones do not report every metric or a cycle count.
How are battery cycles and health calculated?
Battery Watch prefers a device-reported cycle count. When unavailable, the Cycles details screen can estimate recorded use from completed discharge sessions. Health is estimated from remaining charge, charge level and a capacity reference; valid readings are saved locally in Room and averaged over the retained history. Both depend on the data your device supplies.
Can it stop charging at 80%?
You can configure a charge-level alert as a reminder. An alert does not stop charging. Enforcing a hardware charge limit requires root and a supported charging-control interface; Shizuku alone is not enough.
Is Battery Watch free to use?
The app is free to download and contains ads and in-app purchases. Premium unlocks additional features, including custom alerts and advanced statistics. Eligible features can also be unlocked temporarily by watching a rewarded ad. Availability and pricing are shown in the app.
Why does it need background monitoring?
Persistent monitoring helps maintain screen and sleep records when you leave the app and uses a foreground notification. You can choose a lighter tracking mode in Settings. Android background restrictions and manufacturer power management can affect record completeness.
GET TO KNOW YOUR BATTERY
Make every
percent count.
Get Battery Watchon Google PlayBattery monitoring & power controls for Android.
Free download · Contains ads & in-app purchases