Xiaomi Mi 11 Ultra: charging time from 0 to 100% – real tests and secrets of acceleration

Xiaomi Mi 11 Ultra is the flagship of 2021, which is still relevant thanks to the top-end hardware and a unique camera with an additional screen. But even the most advanced smartphones face the eternal problem: how to quickly restore battery power when time is running out? Owners of the Mi 11 Ultra often complain about unstable charging time — somewhere the process takes 35 minutes, somewhere stretches to an hour. What is it?

In this article, we’ll take a look at the real-life charging time of the Xiaomi Mi 11 Ultra in different scenarios, from standard wired 67W to wireless charging and reverse Power Delivery. You’ll learn how temperature, battery wear and even cable choice affect speed, and get practical tips on how to speed up the process without risking the battery. Spoiler: using the original Xiaomi 67W charger reduces charging time to 38-42 minutes at room temperature, but there are nuances with Quick Charge and USB-PD protocols.

Official data vs reality: how much is charged Mi 11 Ultra passport and in practice

The manufacturer claims that the Mi 11 Ultra supports fast charging of 67W (wired) and wireless 67W, promising to recover 100% charge in ~36 minutes. However, in real life, this time is almost always longer. Why?

First, Xiaomi’s lab tests are performed under ideal conditions: air temperature is 20–25°C, battery is discharged to 1%, and the original cable and power supply are used.

• 🔥 Battery temperature above 30°C automatically reduces charging current (built-in protection).
• 🔌 Unoriginal cables or adapters may not support Quick Charge 4+.
• 📉 Battery wear after 300–500 cycles increases charging time by 10–15%.

According to independent tests (including GSMArena and NotebookCheck), the average charging time of the Mi 11 Ultra is between 0 and 100%:

⚠️ Warning: If your Mi 11 Ultra charges for longer than 60 minutes wired, it's a sign of problems with the battery, cable or power supply. → Battery → Battery status.

Phased analysis: how the charging speed changes at different charge levels

The charging of the Mi 11 Ultra is nonlinear, the current is maximum in the first stages, but the speed drops closer to 80%. That's normal, that's how the battery protection algorithm works.

0-50%: At this stage, the phone consumes ~5.5-6.0A at a voltage of 10–11V, which gives 55–65W. The battery is heated to 35–40°C, but the system holds high current. Charging time is up to 50% – 12–15 minutes.

50-80%: Current gradually decreases to 3.5-4.0A, power drops to 40-45W. The temperature stabilizes by 40-42°C. Charging time of this range is 10-12 minutes.

80-100%: This is the tricle charge (slow refilling). Current drops to 1.0-1.5A, power - 10-15W. The last stage takes 15-20 minutes and is accompanied by active cooling.

If you need to restore the charge as quickly as possible, it is optimal to disconnect the phone from the network at 70-80% - then the process slows down greatly.

Wireless charging 67W: myth or reality?

Xiaomi Mi 11 Ultra was one of the first smartphones to support wireless charging 67W. But in practice, this technology does not work as well as I would like.

• ⚡ Real power: At best, you'll get 50–55W loss of energy conversion.
• 🕒 Charging time: from 0 to 100% - 50-55 minutes (vs. 38-42 for wired).
• 🔥 Heat: Phone and charging station warm more than wired charging (up to 45)°C).

For wireless charging Mi 11 Ultra requires the original station Xiaomi Mi Wireless Charging Dock 67W (article MDY-12-EP). Third-party charging (even labeled 67W) usually give no more than 30-40W.

⚠️ Note: Use of non-original wireless charging with higher power 30W The Mi 11 Ultra power controller may overheat, with symptoms: the phone shuts off from charging when heated to 47.°C+.

If you need wireless charging, but the speed is not critical, it is better to limit yourself to stations on 30W – they warm less and cheaper.

5 Factors That Are Retarding Mi 11 Ultra Charging (And How to Remove Them)

Even with the original Mi 11 charger, the Ultra can charge slower than expected.

1. Battery or processor overheating. If the temperature exceeds 40°C, the system limits current. Solution: Remove the case, charge in a cool room or use a cooling stand.
2. Background processes. Applications, updates, or games in the background increase the load. Solution: Enable Airplane Mode or close all applications through Settings → Applications → Launched.
3. Battery wear. After 500 cycles, capacity drops by 15-20%, and charging time increases. Solution: Check battery status in Settings → Battery → Battery status.
4. Unoriginal cable or power supply. Even if the unit supports 67W, the cable may not be able to withstand high current.Solution: Use a cable from the kit or a certified USB-C 5A.
5. Charging optimization enabled. Adaptive Charging in Settings → Battery limits current at night. Solution: Turn it off if you need fast charging.

Battery temperature (must be <40°C)

Originality of the cable and power supply

Background processes (close unnecessary applications)

Battery status in settings

Adaptive charging settings-->

Comparison with competitors: who is charging faster?

In 2021, the Mi 11 Ultra was one of the leaders in charging speed, but today it has been overtaken by many flagships.

As you can see, the Mi 11 Ultra is inferior to modern flagships with 80W+ charging, but bypasses Samsung and Google Pixel. Xiaomi’s main advantage is the combination of high power with 67W wireless charging, which most competitors do not have.

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If you want the maximum charging speed but there is no original Xiaomi 67W unit, you can use adapters from the Realme 65W or Oppo 80W – they are compatible with the Quick Charge 4+ protocol.

How to speed up charging Mi 11 Ultra: 7 proven ways

If you need to recover the Mi 11 Ultra charge as quickly as possible, use these tips:

• ⚡ Use the original block 67W. Third-party adapters with the same power may not support Quick Charge 4+.
• ❄️ Cool your phone. Put it on a metal surface or use a fan. The optimal temperature for fast charging is 20-30.°C.
• 🛑 Disable all unnecessary features. Wi-Fi, Bluetooth, GPS And mobile data increases the load.
• 🔋 Charge with the screen off. Even in standby mode, the display consumes ~1W, slowing down.
• 🔄 Update the firmware. MIUI Charging algorithms are optimized. Check settings. → The phone. → Updating the system.
• 🔌 Check the port. USB-C. Pollution or oxidation of contacts can reduce current.Clean the port with a wooden toothpick.
• 📴 Turn off adaptive charging. This feature is useful for battery durability, but slows down the process. → Battery.

If you use all these methods, the charging time of the Mi 11 Ultra from 0 to 100% can be reduced to 35-38 minutes (under ideal conditions).

Frequent questions about charging Xiaomi Mi 11 Ultra

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The optimal balance between charging speed and battery safety is to use 67W during the day (when you need to quickly), and at night to switch to slow charging 10-18W.