The Best Wireless Chargers for Your Phone

Wireless chargers now center on the Qi2 standard, which integrates magnetic alignment to increase charging efficiency and speed for both Android and iOS devices. According to WIRED, the most effective chargers prioritize higher wattage, thermal management, and adherence to the Wireless Power Consortium’s (WPC) latest specifications to prevent power loss during transfer.

The transition to Qi2 represents a shift in how smartphones receive power. This standard, based on Apple’s MagSafe technology, uses a ring of magnets to ensure the charging coil in the phone aligns perfectly with the coil in the charger. According to the WPC, this alignment reduces the energy wasted as heat and allows for more consistent 15W charging speeds across a wider range of hardware.

How does the Qi2 standard improve wireless charging?

Qi2 solves the alignment problem inherent in older Qi-certified chargers. In previous generations, a slight offset between the device and the pad could slow charging speeds or cause the device to stop charging entirely. The magnetic array in Qi2 locks the device into the optimal position.

WIRED reports that this standardization allows non-Apple devices to access the same magnetic ecosystem previously reserved for iPhones. This means users can now use magnetic wallets, car mounts, and high-speed wireless pads regardless of their phone’s manufacturer, provided the device is Qi2 certified.

Beyond alignment, the standard focuses on efficiency. When coils are misaligned, the charger must work harder to induce a current, which generates heat. Excess heat triggers thermal throttling, where the phone’s software intentionally slows the charging speed to protect the battery. Qi2 minimizes this heat buildup by maintaining a precise gap between the coils.

What are the best wireless chargers for different needs?

Selection depends on whether a user requires a single high-speed pad, a multi-device station, or a portable solution. WIRED identifies several top-performing options based on reliability and speed.

• High-Speed Single Pads: Chargers from brands like Anker and Belkin that support the full 15W Qi2 output are recommended for users who want the fastest possible wireless top-off.
• Multi-Device Stations: 3-in-1 stations that charge a phone, smartwatch, and earbuds simultaneously are cited as the best for bedside tables. These units typically use separate coils for different device architectures, such as the smaller coils required for Apple Watches or Samsung Galaxy Watches.
• Portable Power Banks: Magnetic battery packs that snap to the back of a phone provide a bridge between wired power banks and wireless pads, though they generally charge slower than wall-plugged options.

For users with Samsung devices, WIRED notes that while Qi2 is the industry trend, Samsung’s proprietary Fast Wireless Charging 2.0 can sometimes offer higher speeds on specific Galaxy models when using official Samsung pads. Users must check if a third-party charger supports the specific protocol required for their device’s maximum intake.

How do wireless charging speeds compare to wired options?

Wireless charging remains slower and less efficient than wired connections. A standard Qi2 charger delivers 15W, whereas many modern smartphones support wired fast charging between 25W and 100W. This gap exists because wireless charging relies on electromagnetic induction, which inherently loses energy as heat.

The following data illustrates the typical performance gap based on industry standards:

• Standard Qi (Legacy): Often limited to 5W or 7.5W for many devices due to alignment issues.
• Qi2 / MagSafe: Stable 15W for compatible devices.
• Wired USB-C PD: 20W to 100W+ depending on the device and charger.

This difference means wireless charging is best suited for overnight use or maintaining a charge during work hours rather than rapid recovery from a dead battery.

What should users look for when buying a charger?

The most critical specification is the output wattage. A charger labeled as 15W may only deliver that speed to specific devices; others may be capped at 5W or 7.5W. WIRED advises verifying the “certified” status of the charger to ensure it meets safety and performance standards.

Case compatibility is another factor. Thick plastic or metal cases can interfere with the induction process. Qi2 magnets can often pull through thin cases, but cases with integrated metal rings or magnets from uncertified brands can interfere with the charging coil or cause the pad to overheat.

Finally, users should consider the input power. A 15W wireless pad requires a wall adapter that can provide more than 15W to account for energy loss during the conversion from AC to DC and then to wireless induction. Using an underpowered wall brick will result in slower wireless charging speeds regardless of the pad’s rating.