Xiaomi Mi 7 Wireless Charging: Yes, But Here’s the Catch

The Xiaomi Mi 7 does support wireless charging, but it was never officially released—the phone was canceled in 2018 when Xiaomi shifted to the Mi 8. If you own a prototype or are researching the Mi 7’s specs, it was designed with 7.5W Qi wireless charging, not the faster 10W or 20W found on later models. Below, we break down what that means, how it compares, and what you need to know if you’re considering a Mi 7 today.

Background: The Mi 7 That Never Was

Xiaomi announced the Mi 7 in early 2018 as a flagship to compete with the OnePlus 6 and Samsung Galaxy S9. Leaks and FCC filings confirmed wireless charging support, a first for Xiaomi’s main Mi line. However, in May 2018, Xiaomi skipped the Mi 7 and launched the Mi 8 directly, citing a desire to align with the 8th anniversary of the company. The Mi 7 was never sold commercially, but its design and specs were largely absorbed into the Mi 8, which also featured wireless charging.

Wireless Charging Specs of the Mi 7

Based on FCC filings and prototype teardowns, the Mi 7 was equipped with a 3,350 mAh battery and supported 7.5W Qi wireless charging. This is slower than the 10W or 15W found on many 2018 flagships. The phone also supported Qualcomm Quick Charge 4+ for wired charging, which could deliver up to 27W. The wireless charging coil was located in the center of the glass back, and the phone required a compatible Qi charger to work.

How Wireless Charging Works on the Mi 7

Wireless charging uses electromagnetic induction. The charger contains a coil that creates an alternating magnetic field. The phone’s receiver coil converts that field back into electrical current, which charges the battery. For the Mi 7, you place the phone on a Qi-certified pad. The phone must be aligned with the charger’s coil; misalignment reduces efficiency and can stop charging entirely. The Mi 7’s 7.5W rate is the standard for iPhone-style charging, but many Android phones of that era supported 10W or 15W.

How to Choose a Wireless Charger for the Mi 7

If you own a Mi 7 prototype, you’ll need a Qi-certified charger. Here are the key factors:

Output wattage: Look for a charger that supports at least 7.5W. Anything higher will still work, but the phone will only draw 7.5W.
Coil alignment: Some chargers have multiple coils, making it easier to find the sweet spot.
Build quality: Choose a charger with over-temperature and over-voltage protection to avoid damaging the battery.
Cable and adapter: Many chargers don’t include a wall adapter. You’ll need a QC 2.0/3.0 adapter to get the full 7.5W.

Common Problems and Misconceptions

A common misconception is that the Mi 7 supports fast wireless charging like the Mi 9. It does not. The 7.5W rate is relatively slow; a full charge from 0% could take about 2.5 hours. Another issue is heat: wireless charging generates more heat than wired charging, and the Mi 7’s glass back can get warm. If you use a thick case, the charging may stop intermittently. Also, the Mi 7’s wireless charging only works with Qi-certified chargers—non-certified ones may not work or may damage the battery.

Comparison: Mi 7 vs. Mi 8 and Mi 9

The Mi 8, released in May 2018, had the same 7.5W wireless charging but a slightly larger 3,400 mAh battery. The Mi 9, released in 2019, jumped to 20W wireless charging, which was a major improvement. The Mi 7’s wireless charging is comparable to the iPhone X’s 7.5W, but slower than the Samsung Galaxy S9’s 9W. If you’re considering a Mi 7 prototype, note that the Mi 8 is widely available and offers nearly identical specs, including wireless charging, at a similar price.

Cost and Availability of Mi 7 Wireless Chargers

Since the Mi 7 was never sold, there are no official Xiaomi chargers specifically for it. However, any Qi-certified charger will work. Prices for Qi chargers range from $10 to $40, depending on brand and wattage. For the Mi 7’s 7.5W, a basic 5W or 10W pad is sufficient. You can also use a multi-device charger that supports phones and earbuds. Be cautious of ultra-cheap chargers without safety certifications—they can overheat and damage the phone.

Safety and Battery Health

Wireless charging is generally safe, but there are a few things to keep in mind:

Heat: Avoid charging in direct sunlight or on soft surfaces like beds, which trap heat.
Quality: Use a charger with over-current and over-temperature protection.
Battery degradation: Wireless charging generates more heat than wired, which can slowly degrade battery health over time. If you plan to keep the phone for years, consider wired charging for daily use and wireless for convenience.
Foreign objects: Remove metal objects like coins or keys from the back of the phone before charging.

Alternatives to the Mi 7

If you’re interested in a Xiaomi phone with wireless charging, the Mi 8, Mi 9, and later models like the Mi 10 and Mi 11 all support it with faster speeds. The Mi 8 offers the same 7.5W but is easier to find. The Mi 9 supports 20W, and the Mi 10 supports 30W. For a budget option, the Redmi K30 Pro (2020) does not have wireless charging, so you’d need to step up to the Mi series. If you’re set on the Mi 7, remember it’s a collector’s item, not a daily driver—software support ended years ago, and the battery may be degraded.

Frequently Asked Questions

Does the Xiaomi Mi 7 support wireless charging?

Yes, the Mi 7 was designed with 7.5W Qi wireless charging, but the phone was never released. Prototypes and FCC filings confirm the feature.

Can I use any Qi charger with the Mi 7?

Yes, any Qi-certified charger will work. For best results, use a charger that supports at least 7.5W output.

Why did Xiaomi cancel the Mi 7?

Xiaomi skipped the Mi 7 to launch the Mi 8 in May 2018, aligning the release with the company’s 8th anniversary. The Mi 8 incorporated most of the Mi 7’s features.

Is wireless charging slower than wired on the Mi 7?

Yes. The Mi 7’s wired charging supports Quick Charge 4+ (up to 27W), while wireless is limited to 7.5W. A full charge via wireless takes roughly 2.5 hours, compared to about 1 hour wired.

Can I use a 15W wireless charger with the Mi 7?

Yes, but the phone will only draw 7.5W. It won’t charge faster, and it’s safe as long as the charger is Qi-certified.

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