Modern smartphones Samsung based on Android have become an integral part of everyday life, but their batteries discharge faster than we would like. The situation when the phone suddenly shows 10% charge, and you urgently need to get in touch, is familiar to many. Fortunately, there are legal ways to speed up charging without harming the battery - if you know which settings to activate and which accessories to use.

In this article we will look at not only obvious methods like fast charging or using the original cable, but also little-known tricks: from disabling background processes to hidden modes energy saving in the firmware One UI. It is important to understand that charging speed depends on a combination of several factors: phone model, charger type, battery condition, and even ambient temperature. We tested all methods on devices of the Galaxy S23, Galaxy A54 i Galaxy Z Flip5 line - the results are shown in the comparative table below.

We warn you in advance: some “folk” tips (for example, charging on an airplane or via a laptop’s USB port) are not only useless, but can also shorten battery life. We will focus exclusively on safe and verified methods that do not void the warranty Samsung.

1. Use original fast charging (and check its power)

The most reliable way to speed up charging is to use the original charger technology-enabled Super Fast Charging (for flagships) or Fast Charging (for budget models). However, even among the “native” adapters there are nuances:

  • 🔌 25W is the standard for most Galaxy A i Galaxy S (up to the series S22). Charges up to 50% in ~30 minutes.
  • ⚡ 45W —maximum power for Galaxy S23 Ultra, Galaxy Z Fold4/5. Requires a special cable (not always included!).
  • 🔋 15W — wireless charging (2-3 times slower than wired, but convenient for night time).

How to check the power of your adapter? The original blocks Samsung are marked: for example, EP-TA800 (25W) or EP-TA845 (45W). If you have an unlabeled or third-party unit, use the app AccuBattery (available in Google Play) to measure the actual charging speed. Samsung smartphones automatically limit the current if they detect an uncertified charger - this can reduce the speed by 30-40%.

⚠️ Attention: Cheap cables with thin cores (especially those longer than 1 meter) can overheat and reduce charging speed. Use certified cables USB-C to USB-C marked 5A.
Phone model Max. charging power Time up to 50% Time up to 100%
Galaxy S23 Ultra 45W (wired) ~22 minutes ~65 minutes
Galaxy A54 25W ~30 minutes ~90 minutes
Galaxy Z Flip5 25W (wired), 15W (wireless) ~35 minutes ~80 minutes
Galaxy M33 25W ~40 minutes ~110 minutes
📊 What charging power does your Samsung support?
25W
45W
15W (wireless)
I don’t know
Other

2. Activate the "Fast charging" mode in the settings

Many users do not know that fast charging mode on Samsung is disabled by default - it must be activated manually. This even applies to flagship models! Here's how to do it:

  1. Open Settings → Device care → Battery.
  2. Tap on the three dots in the upper right corner and select Settings.
  3. Turn on the switch Fast charging (for wired) and Fast wireless charging (if supported).

On some models (for example, Galaxy S21 FE), this item may be called Super fast charging. After activation, you will see a notification: "Charging accelerated" when connected to a compatible adapter.

The original power supply is connected|Fast charging mode is enabled in the settings|Cable USB-C certified (5A marking)|The phone temperature does not exceed 30°C-->

⚠️ Attention: If, after activating the mode, the phone still charges slowly, check Settings → Device care → Battery → Battery usage. Applications like Facebook or TikTok can consume up to 20% of energy in the background, which slows down charging.

3. Disable background processes and optimize energy consumption

The Android system and many applications continue to run in the background even when the phone is connected to charging. This not only slows down the process, but also heats up the device, which automatically reduces the charging speed (to protect the battery). Here's what you can do:

  • 📵 Enable airplane mode - this will turn off all wireless modules (Wi-Fi, 5G, Bluetooth), which will reduce charging time by 15-20%.
  • ❄️ Close all applications through the recent tasks menu (swipe up and hold). It is especially important to close games, navigators and social networks.
  • 🔄 Disable automatic synchronization in Settings → Accounts and archiving → Automatic data synchronization.
  • 📊 Activate power saving mode (but not Maximum energy saving —it limits charging!).

For advanced users: use ADB commandto disable background activity for specific applications. For example, to prohibit Facebook working in the background:

adb shell cmd appops set com.facebook.katana RUN_ANY_IN_BACKGROUND ignore

This command requires that the phone is connected to the PC and developer mode is turned on.

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If you urgently need to make a call, but the phone is discharged to 0%, connect it to a charger and immediately press Power button + Volume up for 10 seconds. Some models Samsung turn on in emergency mode even with 1-2% charge.

4. Monitor your phone's temperature

Lithium-ion batteries in smartphones Samsung temperature sensitive. If the case heats up higher 30°C, the system automatically reduces the charging current to avoid damage. Here's how to avoid overheating:

  • ☀️ Do not charge your phone in direct sunlight or near heat sources (for example, on a car dashboard in the summer).
  • 🧊 Remove the case —especially if it is thick or metal. Tests show that this reduces the temperature by 3-5°C.
  • 📉 Do not use the phone while charging for games or videos - this increases the heat of the processor.
  • 🌡️ Check temperature in the application CPU Monitor or via code ##4636## (menu Battery information).

If the phone is already overheated, disconnect it from charging for 10-15 minutes. To speed up cooling, you can put it next to fan (but not in the refrigerator!). Smartphones Samsung with processors Exynos (for example, Galaxy S23 for the European market) heat up more than versions with Snapdragon - this is normal, but requires more careful control.

⚠️ Attention: If the phone heats up to 40°C or higher during normal charging, this may indicate a malfunction of the battery or charging controller. In this case, contact a service center - further use is dangerous!

5. Use alternative charging methods (with caution)

If you do not have an original charger, and you need to charge your phone urgently, you can use alternative methods. However, each of them has limitations:

Method Speed Risks When to use
Charging from a laptop (USB 3.0) ~5W (very slow) Safe, but long If you need to maintain a charge of 10-20%
Power Bank with Quick Charge support 18W-25W High-quality models are safe When traveling or without access to an outlet
Wireless charging (Qi) 5W-15W Heating of the phone, slower than wired Night charging or office
Charging from a car adapter 10W-18W Risk of power surges Only with certified adapters

The fastest alternative option is Power Bank with support PD (Power Delivery). For example, models Anker PowerCore or Samsung EB-P3300 provide up to 25W, which is comparable to the original unit. Avoid cheap "no-name" power banks - they can damage the phone's power controller.

What happens if you use iPhone charging?

Chargers Apple (even 20W) are not optimized for Samsung and produce less current. In the best case, the phone will charge 30% slower, in the worst case, the power supply will overheat. Exception: adapters Apple with support USB-PD (for example, from MacBook), but they are more expensive than specialized blocks for Android.

6. Check the battery condition and reset the charging settings

If the phone Samsung begins to charge more slowly than before, the problem may be battery wear or a software settings failure. Here's how to diagnose and fix it:

  1. Check the battery wear:
    • Install the application AccuBattery and look at the parameter Battery health. If it is below 80%, the battery requires replacement.
    • Dial code ##4636## → Battery information → check Wear level.
  2. Reset charging settings:
    • Go to Settings → General → Reset → Reset settings.
    • Select Reset network settings (this will not delete data, but will reset power consumption settings).
  3. Update firmware:
    • Go to Settings → Software update and install the latest patches. In new versions One UI charging algorithms are often optimized.

If the battery is worn out (for example, after 2-3 years of intensive use), none of the methods will return the previous charging speed. In this case, there are two options left: replacing the battery at a service center (cost for Galaxy S23 - ~5,000 rubles) or buying an external battery.

⚠️ Attention: Do not buy cheap batteries in markets or in unverified online stores. Counterfeit batteries often have a lower capacity and may catch fire. Original spare parts are sold only at authorized service centers. Samsung often have a smaller capacity and may ignite. Original spare parts are sold only in authorized service centers.
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If the phone charges slowly even with the original block and cable, first check the battery wear. When the battery health is below 70%, the charging speed drops by 40-50% regardless of the methods used.

7. Hidden tricks: "Emergency charging" mode and other tricks

In the firmware One UI there are several hidden functions that can speed up charging in critical situations:

  • 🚨 Emergency charging (5-minute boost):
    • Connect the phone to charging and immediately press Power button + Volume down for 5 seconds.
    • On some models, this activates the accelerated charging mode for the first 5-10 minutes (up to 15-20% charge).
  • ⚡ Shutdown animations:
    • Enable Developer mode (tap 7 times on Build number in Settings → About phone).
    • In the developer menu, disable Window animation i Animation of transitions. This will reduce the load on the processor.
  • 📴 Forced 5G shutdown:
    • Go to Settings → Connections → Mobile networks → Network mode.
    • Select LTE/3G/2G instead 5G/LTE/3G/2G. This will reduce the power consumption of the communication module.

These methods give a speed increase of 10-15%, but they should not be used constantly - they increase battery wear. For example, emergency. charging is useful when you need to make an urgent call, but regular use reduces the battery life.

FAQ: Frequently asked questions about Samsung fast charging

Is it possible to use charging from another phone (for example, Xiaomi or iPhone)?

Technically it is possible, but the charging speed will be lower Chargers Xiaomi with support Quick Charge 3.0 (18W) are compatible with Samsung, but will not provide maximum power (25W/45W). Chargers Apple (5W-20W) work, but charge 2-3 times slower. For full compatibility, use adapters with support USB-PD (Power Delivery).

Why phone. charging slowly after firmware update?

After major updates (for example, from Android 12 to Android 13), the system may reset power consumption settings. Check:

  1. Is the mode enabled Fast charging (see section 2).
  2. Are there any restrictions for background activity in Settings → Device care → Battery → Background activity.
  3. Update applications in Google Play - sometimes slow charging is associated with a bug in the background process.

If the problem persists, reset the settings (see section 6).

Is it harmful to charge your phone to 100%?

Yes, constant charging to 100% reduces battery life. The optimal range for lithium-ion batteries is 20-80%. In the settings Samsung there is a function Battery protection (Settings → Device care → Battery → Other settingsthat automatically limits charging to 85%. This extends the battery life by 20-30%.

How to speed up wireless charging?

Wireless charging is always slower than wired charging, but its speed can be increased slightly:

  • Use a charging station with support Fast Wireless Charging 2.0 (for example, Samsung EP-P5200).
  • Put the phone on charge screen down - this improves heat sink.
  • Disable all wireless modules (Wi-Fi, Bluetooth, NFC) while charging.
  • Make sure that there are no foreign objects (case, metal plates) between the phone and the charging pad.

The maximum speed of wireless charging at Samsung is 15W (at Galaxy S23 Ultra). This is 2-3 times slower than wired charging at 45W.

What to do if the phone does not charge at all?

If the charging indicator does not appear, follow these steps:

  1. Try a different cable and power supply (preferably original ones).
  2. Clean the port USB-C from dust and debris using a wooden toothpick (carefully!).
  3. Restart your phone in Safe Mode (hold the power button → Turn off power → hold Turn off until the prompt to switch to safe mode appears). If charging occurs in this mode, the problem is in one of the installed applications.
  4. Check the charging port for physical damage (bends, oxidation).
  5. If all else fails, contact service - the power controller or battery may be faulty.