Qi (pronounced 'chee') is an open-source wireless charging standard developed by the Wireless Power Consortium. It uses electromagnetic induction to transfer power from a charger pad to a compatible device, eliminating the need for physical cables.
How it works: a coil in the charging pad creates an electromagnetic field, which induces an electrical current in a matching coil inside your phone or accessory. This current charges the battery directly. The connection is wireless but requires close physical proximity, typically within a few millimetres.
Why it matters for buyers: Qi charging is the dominant standard globally, supported by Apple, Samsung, Google, and most major manufacturers. If you own a smartphone from the last five years, it likely supports Qi. This means you can use any certified Qi pad without proprietary cables or adapters.
Common gotchas:
- Charging is slower than wired cables. Most Qi pads deliver 5-15W, whilst fast chargers can reach 30W or more, but still lag behind wired equivalents
- Thick phone cases, metal plates, and certain materials block the signal. Remove them if charging fails
- Different pad designs suit different lifestyles. Flat pads work for desks; stands suit video calls; car mounts suit navigation
- Not all Qi chargers are equal. Certified chargers from reputable brands offer better reliability and safety than unlabelled alternatives
When choosing a Qi charger, verify your phone model supports it, check the wattage matches your device's charging capability, and buy certified products from established retailers. Budget wireless chargers often overheat or charge unpredictably.