Start with a clean baseline
Use DeviceOK to collect browser-visible evidence for the portable power station, then move to the operating system or manufacturer only when the browser reaches a documented boundary.
Live evidence
Relevant checks
Battery Runtime CalculatorEstimate runtime from battery watt-hours, average load and conversion efficiency.
→Charger Wattage MatchCompare a device's entered power requirement with a charger's rated wattage while keeping USB-PD/PPS and voltage-profile limits explicit.
→USB Voltage Current to Watts CalculatorCalculate watts from an entered USB or charger voltage/current profile.
→First sequence
Do the high-signal checks before risky changes
- 1
Separate continuous load from startup surge
- 2
Use documented usable capacity/output limits
- 3
Test critical appliances within manufacturer guidance
Decision points
What the result should change
If the function works in a neutral deviceok testPrioritize the affected app, permissions, routing or configuration.
If the function fails in deviceok and another trusted pathPrioritize connection, OS recognition, official diagnostics and then hardware.
If the browser cannot access that subsystemUse the OS/OEM diagnostic route instead of interpreting missing browser data as a failure.
Browser can help check
- Estimate runtime from Wh, load and efficiency
- Compare documented output/input power
Browser cannot prove
- Inspect BMS/cell health
- Measure inverter waveform or surge behavior
- Certify appliance compatibility
Repair boundary
Know when to stop browser troubleshooting
- Avoid firmware/driver downloads from unofficial aggregators.
- Change one variable at a time and retest under the same condition.
- Physical damage, abnormal heat, liquid exposure and battery swelling require appropriate service handling.
Used-device inspection
What to verify before paying or signing off a repair
- Test the exact functions you depend on
- Inspect all ports/controls and included power accessories
- Record pass/fail evidence before purchase or repair handoff