How We Test

Our testing methodology for compatibility, charging speed, heat, and efficiency. Every claim is based on repeatable, documented tests.

Test equipment

All tests use Qi- and Qi2-certified chargers. Wattage measurements use a USB-C power meter (accuracy: ±2%). Temperature measurements use a contactless infrared thermometer (accuracy: ±1°C). Tests are conducted in a controlled indoor environment at 21°C ± 2°C.

Compatibility Testing

  1. 1Device placed on a Qi-certified test pad at controlled room temperature (21°C)
  2. 2Charging initiation confirmed within 30 seconds of placement
  3. 3For Qi2 devices: magnetic alignment verified before charging begins
  4. 4Result cross-referenced against manufacturer specification
  5. 5For "not compatible" results: confirmed on at least two certified chargers

Speed & Wattage Testing

  1. 1Starting battery level: 10% (to ensure maximum charging rate)
  2. 2USB power meter placed inline to measure actual wattage delivered
  3. 3Three measurements taken at 5-minute intervals and averaged
  4. 4Compared against manufacturer-stated maximum wattage
  5. 5Tested with both the bundled charger (where available) and a third-party Qi/Qi2 certified charger

Heat Testing

  1. 1Device surface temperature measured at 15, 30, and 60 minutes
  2. 2Measured with a contactless infrared thermometer at the coil location
  3. 3Ambient temperature: 21°C, device in still air (no active cooling)
  4. 4Heat is rated: Normal (<38°C), Warm (38–43°C), Hot (>43°C)
  5. 5High heat results prompt a recommendation to use the device's built-in battery protection mode

Charge Time Testing

  1. 1Full charge cycle measured from 10% to 100%
  2. 2Device screen off, no active usage during test
  3. 3Measured at least twice; results averaged
  4. 4Compared against our calculator formula to verify efficiency assumptions
  5. 5Partial charge times (e.g. 20% to 80%) also recorded for battery health guidance

Data not available for all devices

Not every device in our database has been physically tested. For untested devices, compatibility data is sourced from official manufacturer specifications. Pages distinguish between "tested" and "specification-based" data where relevant.