Battery and charging port test
See the battery level, detect plugging and unplugging to test a loose charging port, and watch how fast the battery drains. Plus how to read battery health on iPhone, Android and laptops.
✓ Pass if
- Plugging in and unplugging shows up instantly
- Battery drains slowly (over a minute per 1% under heavy load)
✗ Fail if
- Charging cuts in and out when the cable is wiggled
- Battery drops 1% every few dozen seconds
Next test: CPU test: performance and overheating ›
Other tests
- Check device specs
- Dead pixel, backlight bleed and burn-in test
- Screen refresh rate test (Hz)
- Touch screen test: dead zones and ghost touches
- Multi-touch test
- Speaker test: left, right, distortion
- Microphone test: record and play back
- Front camera, rear camera and flash test
- Laptop keyboard test
- Touchpad and mouse test
- Sensor and vibration test
- Fingerprint and Face ID test
- CPU test: performance and overheating
- WiFi and network speed test
- GPS and location test
- Manual used-device checklist