What charging is needed for Xiaomi Mi 9: power, compatibility and adapter choice

Xiaomi Mi 9 is still one of the most popular flagships of the brand, but the question of proper charging of this smartphone is a lot of controversy. Users often confuse the original adapters with fakes, do not understand the difference between fast charging and conventional, and risk spoiling the battery due to improper power supplies. In this article, we will understand what charging is really needed for the Mi 9, how to distinguish the original from a copy and what to do if the standard adapter is lost or broke.

The smartphone supports several charging technologies, including Quick Charge 4+ and its own Mi Turbo Charge, but not all adapters are equally efficient. For example, using the power supply from Redmi Note 8 will only give 10W instead of the required 27W, which is almost 3 times slower! We tested different options and put together a checklist for safe selection.

Original charging Xiaomi Mi 9: characteristics and appearance

Included with the Xiaomi Mi 9 is an adapter model MDY-11-ED (or MDY-11-EU for the European version) with the following parameters:

• 🔌 Power: 27W (9V/3A, 5V/4.5A)
• 🔋 Technology: Quick Charge 4+, Mi Turbo Charge
• 🔌 Connector: USB Type-C (entry) / USB Type-A (cable output)
• 📏 Sizes: 45 × 45 × 25 mm (compact white body)

Distinctive features of the original:

• 🏷️ Inscription Xiaomi and MDY-11-ED on the body (clear font, without blurring).
• 🔍 Logo. QC 4+ on the underside (fakes are often absent from the).
• ⚖️ Weight. ~50 gram (forgery is easier on the 10-15%).
• 🔌 There's a cable in the kit. USB-C → USB-A with the Xiaomi marking (length 1 m).

⚠️ Note: If the adapter says Output: 5V=2A nameless 9V/3A — It is a fake or block from another model (e.g., from Redmi). 7). These adapters charge the Mi. 9 into 2-3 longer.

Charging speed: 27W vs 18W vs 10W - which one to choose?

The power of the adapter depends on how long the Mi 9 will recover from 0% to 100%, and we tested it with different power supplies:

Important: Adapters above 27W (e.g. 33W or 65W) won’t damage the smartphone – Xiaomi Mi 9 will automatically limit consumption to a safe 27W. However, such units can get hotter, so it’s better to use the original or certified counterparts (e.g. from Anker or Baseus).

⚠️ Note: If the smartphone is warmed higher 45°C during charging, immediately disconnect it from the mains. overheating the battery reduces its lifespan by 30-50%.

💡

To speed up charging, turn on Airplane Mode or turn off mobile data – background processes consume up to 20% of energy.

Compatibility with wireless charging: what you need to know

Xiaomi Mi 9 supports wireless charging standard Qi power up to 20W. However, the smartphone does not have a wireless adapter – it must be purchased separately.

• 📱 Xiaomi Mi Wireless Charging Pad (20W) — chiller.
• 🔋 Baseus 15W Qi-Pad - budget option with overheating protection.
• 🚀 Anker PowerWave 10W — universal for all Qi devices.

Features of wireless charging Mi 9:

• ⚡ Maximum power 20W It is only available with the original Xiaomi adapter.
• 🔄 With third-party charging, the speed is usually limited. 10-15W.
• 📉 Wireless charging efficiency is 30% lower than wired charging – some of the energy is lost as heat.

⚠️ Warning: Do not place metal objects (keys, coins) on the charging pad - this can cause short circuit).

Does the adapter have a Qi certificate?|Does it support power? 15W+|Is there a Type-C cable included?|Is there protection against overheating?-->

Can I use charging from other Xiaomi smartphones?

Many users try to charge the Mi 9 with adapters from other Xiaomi models, but not all units work equally well.

The best options to replace:

1. The original MDY-11-ED (27W) is the perfect choice.
2. Xiaomi MDY-12-EU (33W) is suitable, but will not give an increase in speed.
3. Anker PowerPort III 27W is a certified PD analogue.

⚠️ Note: Adapters from the Redmi series (for example, Redmi Note) 8) Frequently no Quick Charge support 4+, So the charging will go on a reduced power (10-12W).

How to verify the authenticity of the Xiaomi adapter?

Not only do fake charges slow down your smartphone, they can damage your battery or even cause a fire.

Additional methods of verification:

• 🔍 Look up the serial number on the sticker and check it on the website mi.com/global/verify.
• 💡 Connect the adapter to the Mi 9 and run the test in the Ampere app (should show) ~27W upon 9V).
• 🔥 Heat the adapter in your hands on 10-15 Fakes often start to smell like plastic.

⚠️ Warning: If the adapter is connected to the smartphone and it warns, "This device is not certified", immediately turn it off.

What to do if the charging does not work?

If the Xiaomi Mi 9 isn’t charging or charging too slowly, follow these steps:

Check the cable for damage.|Clean the Type-C port of dust|Try another adapter.|Reboot your smartphone|Update the firmware MIUI-->

Common causes and solutions:

• 🔌 Type-C port clogged: Clean it with a wooden toothpick (not metallic!).
• 📱 Software Failure: Reset Settings via Settings → System system → Resetting settings.
• 🔋 Battery wear: If the capacity has fallen below 70%, replace the battery (the original cost is the same). ~2500₽).
• ⚡ Faulty adapter: Check it on another device.

⚠️ Warning: If the smartphone is only charged when it is off, it is a sign of a malfunction of the power controller.

💡

Never use turbochargers from other brands (such as Huawei or Oppo) – they can produce unstable voltages that will cause the battery to bloat.

FAQ: Frequent questions about charging Xiaomi Mi 9