Wireless charging
Charging a device via electromagnetic induction from a charging pad, without a cable. Qi is the dominant open standard; MagSafe (Apple) and Qi2 add magnet alignment.
Wireless charging uses an inductive coil in the charger and a receiving coil in the device. Modern phones support 7.5–50 W wirelessly.
Standards
- Qi 1.3 — universal baseline, up to 15 W.
- Qi2 — adds magnetic alignment (MagSafe-derived), 15+ W.
- Proprietary fast wireless — OnePlus AirVOOC 50 W, Xiaomi HyperCharge 80 W.
Efficiency tradeoff
Wireless charging is 60–75% efficient compared to wired (~95%). The lost energy becomes heat — extended wireless fast-charging is harder on the battery than wired.
Reverse wireless
Some phones can act as a charging pad to top up earbuds or a watch laid on the back. Output is typically 5–10 W.
How to use Wireless charging in a real comparison
Charging a device via electromagnetic induction from a charging pad, without a cable. Qi is the dominant open standard; MagSafe (Apple) and Qi2 add magnet alignment. In practice, this is most useful as one part of a decision rather than a standalone quality badge. Compare it alongside the workload, room, ecosystem, budget, and ownership constraints that apply to you; the strongest published figure is not automatically the best outcome for every buyer.
What to check next
On vsMars, read together so the value has product-specific context. It is especially relevant in .
Avoid the one-number trap
Manufacturers can describe the same capability under different conditions. Compare like-for-like variants, check the unit and test condition where available, and use a head-to-head page to see whether a measurable difference is material for your own use.
vsMars presents structured catalog values to make trade-offs legible. The linked product and spec pages are the right place to inspect the underlying values before buying.