Why Xiaomi Redmi is not charging 9C How to fix it without service

Xiaomi Redmi 9C — One of the most popular budget smartphones, but even it is not immune to charging problems. If your device suddenly stopped charging, do not rush to carry it to the service: in 80% of cases, the cause can be eliminated yourself. 9C, even if the phone is turned on, but the battery is not charged, or the device does not respond at all to the connection to the network.

We will look at all possible scenarios, from the banal damage of the cable to software failures. 9C, which are not found in other Xiaomi models – for example, the problem with recognizing the original chargers after the update MIUI. You will also find step-by-step instructions with photos, a charger compatibility table and answers to frequent questions.

Before you start the diagnosis, check the obvious: whether the socket is working (plug another device), whether the smartphone will overheat (even Redmi). 9C Can block charging at temperatures above 45°C), and if there's any moisture in the connector, if everything's okay, we'll start a detailed analysis.

1. Check of charger and cable: 3 tests

Start with the simplest thing, checking the components. Even if you use the "native" cable and the power supply, they could have failed. 9C particularly sensitive to quality USB-cables: cheap analogues often do not provide stable voltage, causing charging to be interrupted or not at all.

Here’s how to check the charger correctly:

• 🔌 Test 1: Connect Redmi 9C other charger (preferably original from Xiaomi on the 10W or 18W). If charging went - the problem in the power supply.

Pay attention to the power of the charger.Redmi 9C charge up 10W, It can also work with blocks on 5W (However, if you are using a charger on 18W And above, the smartphone can ignore it because it doesn't support fast charging:

⚠️ WARNING: If you use a cable with damaged insulation, it can lead not only to charging problems, but also to a short circuit that will disable the smartphone's power controller.Replace the cable at the first signs of wear and tear.

2. Cleaning the connector USB-C: step-by-step

One of the most common reasons why Xiaomi Redmi 9C not charged - contamination or oxidation of the connector USB-C. Dust, pile, moisture, or even fine debris can disrupt contact. Unlike microUSB, the Type-C connector is more vulnerable to foreign particles because of its shape.

How to properly clean the connector:

Turn off your smartphone and remove it. SIM-map

Use a flashlight to inspect the connector for debris

Carefully remove dust with a wooden toothpick (not metal!)

Wipe the contacts with an alcohol napkin (70% isopropyl alcohol)

Allow the connector to dry completely (10-15 minutes)-->

If there is moisture in the connector (for example, after rain or spilled liquid), do not connect the charge immediately.

1. Turn off the phone.
2. Place it in a silica gel (or rice) bag for 6-12 hours.
3. After drying, check the charging.

For Redmi. 9C One thing that's characteristic of this is that if moisture is in the power controller (not just the connector), the phone can turn on, but not charge, and then the "Moisture in the connector" warning will appear on the screen. If the message doesn't disappear after drying, repairs are required.

⚠️ Warning: Never use metal objects (needles, paper clips, knives) to clean the connector, which can damage or close the contacts, causing permanent damage to the motherboard.

3. Reset Charging settings: software failures MIUI

Sometimes Xiaomi Redmi 9C It does not charge due to malfunctions in the firmware MIUI, Especially after updates. It can manifest in different ways:

• 🔄 The phone is charged only when it is off.
• 📉 The swelling is in the beginning (and then it stops).
• ⚡ The screen displays Charging, but the percentage of the battery does not increase.

In these cases, resetting the food settings helps. Here's how to do it:

1. Go to Settings → Battery and Performance.
2. Select Battery Settings → Resetting battery settings.
3. Confirm the action and restart the phone.

If it doesn’t help, try updating. MIUI last-minute:

1. Open Settings → About the phone → System update.
2. Click Check Updates and install available patches.
3. After the update, reset the battery settings again.

For Redmi. 9C The problem with updating to MIUI 12.5 and higher: Some users report that after upgrading the phone no longer recognizes the original chargers, in which case a rollback to the previous firmware version or installing a custom recavator (for example, TWRP).

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After the update MIUI So the phone is slowly charging, try turning off the Optimized Charging function in the battery settings, which limits the charge to 80 percent to save battery capacity, but sometimes it doesn't work properly.

4.Battery Diagnosis: When Replacement Needs

If Xiaomi Redmi 9C It doesn't charge even after all the manipulations, the problem may be a worn-out battery, the average battery life is 2-3 years (or 500 full charge cycles), after which the capacity drops, and the phone can be used:

• 🔋 Fast discharge (from 100% to 0% in 2-3 hours).
• 🛑 Disconnect at 20-30% charge.
• 🔌 Do not charge above a certain percentage (e.g. 80%).

How to check the status of the battery:

1. Enter the number #4636##.
2. Select Battery Information.
3. See the setting Wear Level (if any) or Capacity. If the capacity is less than 70% of the original (3000 mAh for Redmi). 9C) — battery-change.

You can also use apps like AccuBattery (available on Google Play) that show real capacity and wear rate. 9C bloated (seen by the deformation of the back cover), immediately stop using it - it is dangerous to health!

⚠️ Note: If you decide to replace the battery yourself, use only the original battery for Redmi. 9C (articular MB09). Cheap analogues can not only quickly fail, but also damage the power controller, which will lead to a complete failure of charging.

5.Verification of the power controller: when the charge is to blame

If all previous methods failed, the problem could lie in the power controller, the chip on the motherboard that controls charging. 9C This controller often fails because of:

• ⚡ Voltage surges (for example, when using low-quality chargers).
• 💧 Moisture on the board.
• 🔥 Overheating (if the phone has been under load for a long time).

Signs of Controller Failure:

• 🔌 The phone doesn’t respond to charging at all (even doesn’t show the battery icon).
• 🔄 Charging is only in a certain position of the cable.
• 🔥 The phone warms strongly in the area of the connector when connecting charging.

Unfortunately, you can't fix the power controller yourself, because it requires soldering and special equipment, but you can do a preliminary diagnosis of:

1. Try charging your phone from the power bank, and if you don't get a reaction, it's indirectly a faulty card.

The cost of repairing the power controller in the service center is from 1500 to 3000 rubles (depending on the region). If the phone is warranty, contact the official Xiaomi service - in 60% of cases, such repairs are covered by the warranty, even if you used unoriginal charging.

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If Redmi 9C It's not charging and it's not turning on (black screen, no reaction), don't try to "resuscitate" it with multiple charging connections. This can aggravate the damage to the board.

6. Alternative charging methods: what to do in emergency cases

If you need to charge Xiaomi Redmi immediately 9C, But standard methods don't work, you can try alternative methods, they won't solve the problem forever, but they will help you to "get through" to repair.

Method 1: Charging through OTG-cable

If I connect USB-C damaged, but the phone is turned on, you can connect an external battery (power bank) through OTG-adapter USB-A → USB-C. For that:

1. Connect. OTG-phone adapter.
2. Connect the adapter to the power bank via USB-cable.
3. The phone should start charging (slowly but steadily).

Method 2: Wireless charging (with adapter)

Thought Redmi 9C does not support wireless charging, you can use a Qi receiver that connects to the connector USB-C. For example, the adapter Nillkin Magic Disk. the disadvantage of this method is a low charging speed (about the same time). 3W) and the risk of overheating.

Method 3: Charging from another phone

If you have a second phone with Reverse Charging (such as Samsung or Huawei), you can connect Redmi. 9C through USB-And then you can transfer some of the charge:

1. Activate the recharge mode on the donor phone.
2. Get Redmi on board. 9C cable USB-C → USB-C.
3. On the Redmi. 9C A notification of the start of charging will appear.

⚠️ Warning: Alternative charging methods can damage the battery or power controller if used regularly!

7.When to contact the service: checklist before the visit

If you have tried all the methods, but Xiaomi Redmi 9C It's still not charging, it's time to go to the service center:

Original box and documents (if the phone is guaranteed)

Charger and cable (to demonstrate the problem)

Screenshots of errors (if they appear on the screen)

List of actions you have taken (which you have already tried)-->

The cost of repair depends on the reason:

• 🔧 Replacement of the connector USB-C: 800-1500 rubles.
• 🔋 Battery replacement: 1200-2000 rubles (with work).
• 📱 Repair of the power controller: 1500-3000 rubles.
• 🔄 Firmware reflashing (if the problem is in the software): 500-1000 rubles.

If the phone is warranty, repairs must be free, but only if:

• You used the original charger.
• There are no mechanical damages (cracks, dents).
• There was no attempt at self-repair.

Official Xiaomi service centers in Russia can be found on the website mi.com/ru/service/center. Check by phone before you visit if they work with your model – some centers do not take budget smartphones like Redmi. 9C.

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If you're asked to "swipe your phone in 5 minutes" as a panacea for all your charging problems, that's a reason to be wary, and 90 percent of the time, the problem is hardware, not software.

FAQ: Answers to Frequent Questions