Useful confirmation
A changing level or power state confirms that the browser is receiving live battery updates from this device.
All tests
Runs locallyNo accountNo install
ONLINE HARDWARE TEST
Battery Test
Watch live charge level, charging state and power-source changes where the browser supports them.
This checks live battery behavior—not long-term battery health.Browsers do not expose cycle count, design capacity, wear percentage, temperature, voltage, or individual cell condition.
Reading battery information…
This normally takes only a moment.
Possible warning signs
Unexpected shutdowns, swelling, excessive heat, or a very rapid drop require an operating-system or professional battery check.
Not a health score
A percentage and time estimate cannot reveal remaining capacity, cycle wear, or damaged cells.
LOCAL DIAGNOSTIC REPORT
Battery status test result
This browser does not expose live battery telemetry. Continue with the operating-system instructions above.
- Browser battery API
- Checking
- Current charge
- Unavailable
- Power state
- Unavailable
- Browser updates
- 0
- Power changes
- 0
- Observation
- Not completed
What this result supportsThe current browser-exposed charge and power state, and whether those readings changed during the observation.
What it cannot proveBattery health, design versus full-charge capacity, cycle count, cell condition, charger wattage, runtime under load, swelling or thermal safety.
Battery readings and observation results stay in this browser tab and are not uploaded by KeyTest.
ABOUT THIS TEST
Fast answers without installing software.
Watch live charge level, charging state and power-source changes where the browser supports them.
Browser limitation: Browser diagnostics provide practical signals but cannot replace physical inspection or professional repair.
Diagnostic input is processed locally for this test and is not uploaded by KeyTest.