Users of the Samsung Galaxy S21 have recently reported an issue with slow charging. The device, which has been available for a couple of years, is equipped with the Qualcomm Snapdragon 888 SoC and Exynos 2100 SoC, and offers 25W fast charging support via a wired connection and 15W wireless charging capability. If you are experiencing slow charging on your Samsung Galaxy S21 5G, this guide will provide you with steps to troubleshoot and resolve the issue.

Samsung Galaxy S21 Series Slow Charging

The Samsung Galaxy S21 series may experience slow charging due to various factors, such as software issues or a malfunctioning charging adapter. We have compiled a list of potential solutions to troubleshoot and resolve this issue. Please try the following steps to fix slow charging on your device.

Check your charging adapter

This is the first thing to check when you experience slow charging, as companies no longer bundle the travel adapter. If you have been using a third-party charging adapter, double-check if it is compatible with your device. To do this, refer to your device’s maximum charging speed, which is 25W. Samsung sells travel adapters on their website. If you don’t want to purchase the official Samsung charging adapter, you can opt for a third-party adapter. Just make sure it supports USB PD 3.0 to ensure compatibility and faster charging for your device.

Enable fast charging on your Samsung Galaxy S21

Samsung’s OneUI has an option to enable and disable fast charging, but it is not enabled by default. To enable it, follow these steps:

  • Open the device settings and go to Battery and Device Care.
  • From there, go to Battery and tap on More Battery Settings.
  • Check Fast Charging and toggle to enable it.

This will enable adaptive fast charging (up to 18W) and should also work with the official 25W Samsung fast charger. Samsung disables this option by default because when they stopped bundling the adapter in the box, many people opted for third-party solutions. To avoid any battery issues, they disabled the fast charging option.

Check your USB cable

If you are still experiencing issues, you may have a faulty charging cable or an incompatible fast charging cable. We recommend using the official Samsung cable, but you can also purchase one separately if your cable is damaged. For third-party solutions, check to see if the cable supports fast charging and at what speeds it supports. Sometimes damage to the cable may not be visible, as it may be damaged on the inside. We advise you to first try using another fast charging cable. If your device is charging quickly and shows fast charging, then the issue is with the cable.

Check the power source

If you have checked the cable, charger, and enabled fast charging, the problem may be with the power source. It may not be able to provide sufficient output, which is not enough power for the device to fast charge. Try charging your device using a different port or test it with a fast charging power bank. Alternatively, check the power output for the board to confirm if the issue is with the power source.

Check your charging port

If everything else is working and the problem persists, the issue may be with your device itself. The charging port may be dirty or damaged, possibly due to improperly removing or plugging in the cable. In this case, try visiting the official Samsung service center to have your device checked and, if necessary, replaced.

Update your device to the latest version

Sometimes, charging issues can be caused by software and may be fixed with an update. To check for updates, go to Software Update in the device settings. If an update is available, download and install it as soon as possible. If there are no updates available, your device will be marked as up to date.