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Wireless Charger diagnostics

Test what the browser can see. Know when it cannot.

Check power-source assumptions and device symptoms before treating slow or intermittent wireless charging as a failed phone or charger.

Run these first

Relevant live checks

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.
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USB Voltage Current to Watts CalculatorCalculate watts from an entered USB or charger voltage/current profile.
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Browser Battery StatusShow charging state and charge level when the browser exposes the Battery Status API.
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First diagnostic sequence

Do the high-signal checks before risky changes

  1. 1

    Remove cases or accessories that interfere with alignment

  2. 2

    Use the charger and power adapter combination specified by the manufacturer

  3. 3

    Compare wired charging if wireless charging is intermittent

What DeviceOK/browser can help check
  • Compare entered charger wattage to device requirements
  • Show browser-exposed battery charging state where supported
What this browser page cannot prove
  • Read Qi or Qi2 negotiation generically
  • Measure coil alignment or thermal throttling
  • Certify charger safety