Why Does Fast Charging Slow Down Drastically After 80%? (The CC/CV Physics Explained)
You plug your smartphone into a 65W, 80W, or even 120W ultra-fast charger with a depleted 5% battery....
100% Verified Hardware Anti-Overcharge Utility
Protect Your Phone Battery.
Stop Charging at 80% & Double Its Life.
The ultimate intelligent charging alarm engineered for Android. Features real-time hardware battery polling, custom 10% to 100% threshold limits, interactive numeric keyboard input, screen-off WakeLock background protection, and an anti-theft cable disconnect alarm.
A
Lead Developer: Arooba
Hardware Firmware & Mobile Diagnostics Engineer
Tekzyro Battery Guard
Official Release v1.0.4 • Signed Android APK
Download Free APK (50.2 MB)
Compatible with all Android devices (Android 8.0 Oreo up to Android 15).
Package: BatteryGuard v1.0
VirusTotal: 0/72 Clean
Signatures: v1 + v2 Verified
Privacy: 100% Ad-Free
1-Second Precision Polling
Screen-Off Doze WakeLock
Direct Keyboard Typing
Cable Unplug Siren
Natural Voice Alerts
Knowledge Silos
Explore Engineering Topics & Hardware Guides
⚡ Battery Optimization
In-depth electrochemical analysis, charge-cycle preservation science, and heat mitigation benchmarks.
🔧 System Fixes
Troubleshooting smartphone sensor errors, lag spikes after system updates, and touchscreen calibration.
🛡️ App Manuals & Guides
Step-by-step documentation for Tekzyro Battery Guard, custom alarm sound configs, and battery bypass tips.
Recent Articles
Latest Hardware Insights & Diagnostics
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Benchmark Matrix
Why Tekzyro Battery Guard Beats Generic Apps
| Key Capability | Tekzyro Battery Guard (by Arooba) | Built-in OEM Android Limit | Generic Play Store Apps |
|---|---|---|---|
| Custom Percentage Target | ✅ Any integer between 10% and 100% | ❌ Rigidly fixed at 80% only | ❌ Locked behind Pro paywall |
| Direct Keyboard Typing | ✅ Real-time interactive numeric box | ❌ No input option | ❌ Clunky sliders only |
| Screen-Off Doze WakeLock | ✅ Guaranteed wakeup during deep sleep | ❌ Silent stop (No alarm) | ❌ Killed by aggressive OEM RAM savers |
| Anti-Theft Unplug Siren | ✅ Immediate alert on cable disconnect | ❌ Not available | ❌ Paid subscription feature |
| Ad Experience & Privacy | ✅ 100% Ad-Free & Zero Trackers | ✅ Clean | ❌ Fullscreen popups & telemetry |
Verified Engineering Benchmark
Laboratory Benchmark Test by Lead Developer Arooba
"Tested across 32 individual Android handsets running Samsung One UI 6, Xiaomi HyperOS, OnePlus OxygenOS 14, and Google Pixel Android 14/15. The background foreground service maintained a 100% screen-off wake alarm success rate with an unnoticeable idle battery impact of less than 0.01%."