Power Battery: Health Monitor

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About this app

Is your charger actually fast charging? See the real speed in mA — instantly.
Power Battery is a battery monitor that shows the data Android usually keeps out of sight: live charging speed in milliamps (mA), voltage, temperature, estimated battery health, and charge cycles. Real diagnostics, no gimmicks.

⚡ REAL-TIME CHARGING SPEED
See exactly how many milliamps (mA) your charger delivers the moment you plug in.

• Live mA reading while charging and discharging
• Compare chargers and cables side by side
• Spot slow or faulty cables
• Check whether fast charging is actually kicking in

🔋 BATTERY HEALTH & CAPACITY
Power Battery estimates your battery's capacity by measuring how it charges and discharges over time — the more you use it, the clearer the picture.

• Estimated capacity (mAh) and health %
• Wear level and capacity trend over time
• Charge cycle tracking from the day you install
• Helps you decide between a battery replacement and a new phone
Note: capacity, health, and cycle figures are estimates based on measurements taken after install (and, on supported devices, system battery data). They're a useful guide, not lab-grade readings.


🌱 MAKE YOUR BATTERY LAST LONGER
• Care insights based on heat exposure, time held at a high charge, and deep discharges
• Personalized tips that turn your data into simple, lasting habits
• Wear trend so you can watch how your battery is aging


🔔 SMART ALERTS
• Charge limit alarm — get alerted at a level you choose (e.g. 80%) so you can unplug before 100%

• Full charge, low battery, high temperature, and high voltage alerts
📊 ANALYTICS & HISTORY

• Voltage, temperature, current flow, charge source, and time-to-full / time-to-empty

• Charging speed classification: fast / moderate / slow

• History and graphs across 1h, 6h, 24h, 7d, and 30d

• Export your data (CSV / JSON)
🎧 CONNECTED DEVICES

• See the battery level of paired Bluetooth earbuds, watches, and speakers

• A dedicated connected-devices widget

📱 WIDGETS & THEMING
• Home screen widgets in small, medium, and large sizes

• Material You theming with dark and AMOLED modes
⭐ POWER BATTERY PRO

The core app is free. A one-time Pro upgrade unlocks detailed graphs, the charge limit alarm, custom + AMOLED + Material You themes, unlimited history, CSV / JSON export, and priority support.

💡 GOOD TO KNOW
• Charging roughly between 20–80% can help extend battery lifespan

• Heat is one of the biggest causes of battery wear

• Not every "fast charger" delivers its rated speed

• Capacity naturally decreases as charge cycles add up
🔒 PRIVACY

Your battery data stays on your device. Permissions, plainly: Bluetooth is used only to read the battery level of your connected devices; notifications power your charge alarm and battery alerts. That's it.
Download Power Battery and see what your charger — and your battery — are really doing.

Questions or feedback? Reach us any time through the developer email.

Ratings and reviews

not hooked to charger, says charging

Very useful app I was able to choose the right charging wire using this app. It shows all of the most needed information about battery health and phone temperature. Now I can choose the right charger from the many I have. 100% recommend

I love the accuracy and detail it tells about the battery and battery life much better than the battery apps I used in the past definitely highly recommended 👍