Xiaomi Redmi phone is not charging well: all the reasons and what to do

Have you connected a Xiaomi Redmi smartphone to charge, but the percentage of the battery crawls like a turtle, and sometimes even stands still? Or does the device discharge faster than it can charge? This problem is familiar to many owners of low-end and mid-budget Redmi models — from the old Redmi 4X/5A to the new Redmi Note 12/13. In 80% of cases, slow charging is not associated with a battery breakdown, but with software, cable or power supply.

In this article, we'll look at all the possible causes, from the banal contamination of the connector to the hidden MIUI settings that slow down charging, how to diagnose a problem without visiting a service center, what software tricks will speed up charging by 30-50%, and when it's really time to change the battery, and at the end, a checklist for quick check-ups and answers to frequent questions.

1. Problems with the charger: block, cable, socket

The first thing to check is the charging kit. Even the original Xiaomi units fail over time, and cheap ones often fail to deliver the declared power. For example, if your Redmi Note 10 Pro supports 33W and the power supply only produces 10W, the phone will charge 3 times slower.

How to check:

• 🔌 Connect another power supply (preferably original or certified) Xiaomi/Redmi If the charging went faster, the problem is in the block.
• 🔗 Try another cable. Cheap cables often have thin veins that can't withstand high currents. Notice insulation damage or inflection at the connector.
• 🔋 Check the socket or USB-Connect the charger to another power source (computer, power bank, other socket), sometimes the problem lies in poor contact.

Critical: If the power supply is heating more than usual, or makes extraneous sounds (squeaking, crackling) - immediately turn it off! This is a sign of a short circuit or failure of the capacitors.

2.Contamination or damage to the USB-C connector

The USB-C connector in Redmi is one of the most vulnerable places, and dust, pocket pile, contact oxidation, or mechanical damage (such as after a fall) can disrupt the current transmission, causing the phone to either not charge at all or to do so very slowly.

How to clean the connector:

1. Turn off the phone and get it out. SIM-memory-card.
2. Take a toothpick or plastic spatula (not metal!) and carefully remove visible debris.
3. Soak the cotton swab in isopropyl alcohol (90%+) and wipe the contacts. Don't use water or wet wipes!
4. Allow the connector to dry for 10-15 minutes before charging.

💡

If you're still snatching after cleaning, try to lift the cable up or down slightly during the connection, and if the charging speed changes, the problem is the wear and tear of the connector, and it's time to change it.

⚠️ Warning: Never use metal objects (needles, paper clips) to clean, they can close contacts and disable the charging controller. If the connector is shattered or bent, you should contact the service.

Battery wear: how to check and what to do

Redmi's lithium-ion batteries degrade over time, and after 300 to 500 charging cycles (approximately 1.5 to 2 years of active use), battery capacity declines by 20 to 30 percent, resulting in:

• 🔋 Slow charging (especially in the last 20 years%)
• ⚡ Quick discharge, even in standby mode
• 📉 Disconnection at 10-15% charge

How to check the wear:

1. Go to Settings → Battery → Battery status (on new versions of MIUI, the path may be different).
2. Look for capacity or wear. If the capacity is below 80 percent of the original capacity, change the battery.
3. Use apps like AccuBattery (Android) for detailed diagnosis.

⚠️ Warning: If the battery is swollen (the phone body is convex, the screen "steps" from the frame) - immediately turn off the phone and do not use it.

4. Programmatic reasons: MIUI settings and background processes

MIUI is known for its aggressive power management, sometimes artificially restricting charging currents to extend battery life.

• 🤖 Background applications that consume resources (especially games, social networks, instant messengers).
• 🔄 Auto-updates of applications and systems in the background.
• 📱 Power saving mode or "Ultra-battery mode".
• 🔧 Optimization of charging (function in the MIUI, which limits the charge to 80-90%).

How to eliminate:

1. Open Settings → Battery → Battery Mode and turn off Ultra Mode or Energy Saving.
2. Go to Settings → Battery → Settings → Optimize charging and turn it off (or set a limit of 100%).
3. Close all background applications through Recent Tasks (Swipe Up and Hold).
4. Turn off auto-update apps in Google Play → Settings → Auto-update.

Turn off the power saving mode

Set the charging limit to 100%

Close background annexes

Disable auto-updates

Reboot the phone-->

⚠️ Attention: If the phone gets warmer after the power cut, it's normal to charge fast, but if the temperature is above 45.°C (can be checked in AccuBattery), it is better to interrupt the charging.

5. Damage to the charging controller or board

If all previous steps did not help, the problem may lie in the hardware:

• 🔧 Charging controller (a chip on the motherboard responsible for current distribution).
• 📱 Damage to tracks on board (for example, after falling or getting moisture).
• ⚡ Short circuit in the food chain.

Signs of hardware breakdown:

• The phone is charged only when it is off.
• The swelling is a snag (it stops and goes).
• The phone does not detect the charger or write "Charging suspended."
• The battery is discharged even when connected charging.

What to do:

1. If the phone falls or gets wet, do not try to fix yourself - contact the service. Corrosion on the board can lead to irreversible damage.
2. If the problem occurred after the MIUI update, try to roll back to the previous firmware version (the instructions are available on the 4PDA or Xiaomi Community forums).
3. To diagnose a charging controller, you need a multimeter and experience with electronics.

6. Effect of temperature on charging speed

Xiaomi Redmi automatically reduces the charging current if the battery temperature goes beyond 10–40°C. This is done for safety, but often causes slow charging.

• 🌡️ In the summer, when the phone warms up in the sun.
• ❄️ In winter, if you charge your phone in the cold (for example, in a car).
• 🎮 During gaming or heavy use (the processor is heated and the battery is heated with it).

How to charge correctly:

• 🔥 Do not charge your phone in direct sunlight or near heat sources (battery, heater).
• ❄️ If the phone is cold, let it heat up to room temperature before charging.
• 🎮 Disable resource-intensive applications (games, video editing) while charging.
• 📴 Remove the cover - it can worsen the heat sink.

⚠️ Warning: If the phone is warming for no apparent reason (even in standby mode), it may indicate a surge in heat:

• Failure of the battery (swelling, short circuit).
• A virus or malware that loads the processor.
• Problems with the power controller.

7 Wireless charging: why it's slower

Redmi models with Qi-enabled charging (like the Redmi Note 12 Pro+) often find wireless charging 2 to 3 times slower than wired charging. This is normal, but there are ways to optimize the process:

Causes of slow wireless charging:

• 🔄 Discoatility of the coils (the phone is not in the center of the charging platform).
• 📶 Low power charger (many wireless chargers only give out a charger) 5W–10W).
• 🛡️ Case or metal objects between phone and charge.
• 🔋 Overheating (wireless charging heats the phone stronger than wired charging).

How to speed up:

1. Use a charging station with support for Fast Wireless Charging (15W and above).
2. Remove the case before charging.
3. Place the phone strictly in the center of the site (should sound a beep or appear indication).
4. Do not use your phone while charging (especially for games or videos).

💡

Wireless charging will always be slower than wired charging because of the physical limitations of the technology; the top speed for the Redmi is 30W (the top models), but in reality it rarely exceeds 15-20W.

8.When is the time to bring the phone to the service

If you've tried all of these, but the problem is still there, it's probably a hardware malfunction.

• 🔌 The phone does not charge at all (even from different power supplies).
• 🔥 The battery swelled or deformed the body.
• ⚡ Charging is only in the off state.
• 📉 The battery is discharged in a few hours without active use.
• 💥 The phone is automatically turned off or rebooted.

Cost of repair in official Xiaomi services (2026):

⚠️ Warning: Unofficial services may use unoriginal parts that will last less or damage the phone. Always ask for a warranty for work and components!

FAQ: Frequent questions about Redmi charging