Battery Health Samsung

Battery Health Samsung

How to check the battery health on a Samsung – step by step

To keep track of the battery health of your Samsung phone is important to ensure that your phone is working properly and that the battery lasts a long time. Here we go through the best ways to check your battery – both via Samsung’s own tools and with third-party apps. We also show how we at reNewed ensure that all used Samsung phones Comes with a good battery.

1. Check battery health via Samsung Members (recommended way)

Most Samsung phones come with the Samsung Members app pre-installed. If you don't have it, you can download it for free from the Galaxy Store or Google Play.

How to use:

  1. Open Samsung Members.

  2. Tap Support at the bottom.

  3. Select Phone diagnostics.

  4. Click Test All.

You will then get an overview of the battery health, which will be displayed as Good , Fair , or Weak.

2. Use third-party apps for more details

If you want to see more accurate figures on the capacity in percentage, you can download apps like:

  • AccuBattery

  • DevCheck

  • CPU-Z

These apps show an estimate of how much of the original battery capacity is left.

3. >80% battery health on used Samsung from reNewed

When you buy a used Samsung from reNewed, you can feel safe. We:

  • Always test the battery's capacity and performance.

  • Replace the battery if it is not up to standard.

  • Only sell phones with at least 80% battery health.

👉 This means you get a reliable phone with a long lifespan - at a better price than a new one.

4. Optimize battery via settings

To improve battery life, you can use Samsung's built-in features:

  1. Go to Settings.

  2. Select Battery & device care.

  3. Click Battery.

Here you can see usage, power saving options, and optimize your phone for longer battery life (though not exact battery health).

5. Detect abnormal battery behavior manually

There is also a hidden menu that can show more information:

  1. Open the Phone app.

  2. Enter *#0228# and press Call.

Here you will see details about voltage, capacity and temperature. Some warning signs are:

  • Low voltage: Typically 3,7–4,4V. Below 3,5V at 50% may indicate wear.

  • Sudden voltage drops: Rapid jumps in volt levels can mean worn cells.

  • Incorrect capacity information: If a 5000 mAh phone shows <3000 mAh capacity.

  • Abnormal temperatures: The battery should be around 25–40°C during normal use.

  • Unexpected shutdowns: If the phone turns off at, for example, 30% charge.

Conclusion – when should you change the battery on your Samsung?

If you notice that the battery is losing charge quickly, becomes abnormally hot, or if the phone turns off for no reason, then it's time to replace the battery.

With us at reNewed you can be sure that you will always get a Samsung with a tested and reliable battery with at least 80% capacity or a brand new battery.

👉 See our selection of used Samsung phones and make a safe purchase.