• Protect Battery is a feature in Samsung smartphones that limits the maximum battery charge to 85% to increase its life.
  • Protect Battery helps maximize battery performance by reducing charge wear and protecting against high temperature and voltage.
  • Whether you use Protect Battery or not depends on whether you prioritize longer battery life or maximizing battery capacity.
All smartphones have a lithium-ion battery with a specified lifespan, which is measured by the number of complete charge/discharge cycles it can go through before it begins to degrade. The average life of a typical lithium-ion battery is about 300 to 500 charge cycles or about two to three years.

If you want to keep your phone for a while, Samsung’s Protect Battery feature can help extend battery life. Below, we talk more about what Protect Battery is, how to use it, and whether you should leave it on.

Read more: The best iOS features that Android lacks

What is Protect Battery in Samsung Phones?

Protect Battery is a battery management system (BMS) available on Samsung smartphones running One UI 4.0 (Android 12) or higher. It works by limiting the maximum battery charge to 85% to extend battery life.

You might wonder how limiting battery capacity helps extend battery life, but the science behind the Protect Battery feature is quite sound.

To begin with, we need to explain what a full charge cycle is. This is a full charge and discharge of the battery, i.e. a full charge to 100% and then a full discharge to 0%. Once your battery goes through a charge cycle, it is dead and cannot be recovered. This is not due to some sinister design flaw in battery technology. This is how all rechargeable batteries work.

So, how does battery protection help? While it’s true that you can’t control charge cycles, and by the time you’re using your phone and charging it, a full cycle will pass, there’s a certain level at which it’s more efficient and safer to charge your battery.

By limiting charge to 85%, Protect Battery reduces charge wear and maximizes performance. In other words, it will stop the charging process as soon as it reaches the stage where your battery is likely to fail. It also helps to protect the battery from high temperature and high voltage from full charge, two main disadvantages of Li-ion batteries.

How to use Protect Battery

There are two main ways to use Protect Battery on your Samsung smartphone. The first method is the simplest.

  1. Find the Protect Battery button by pulling down the status bar.
  2. Swipe down again to bring up the Quick Settings panel.
  3. Protect battery should be one of the icons displayed in one of the panel sections.
  4.  If it doesn’t exist, you can add it by tapping the three-dot icon, selecting Edit buttons, and choosing   Protect battery from the list of options.

Alternatively, you can turn it on from the Settings app:

  1. Open the Settings app and select Battery and Device Care.
  2. Tap  Battery and scroll down to More Battery settings at the bottom.
  3.  Turn on the switch next to Protect Battery.

If you want to customize this feature a bit, you can set up a Bixby routine that turns on when certain conditions are met. For example, you can create a routine that turns on battery protection when you’re asleep and turns it off automatically just before you wake up.

Should I use a protective battery?

Protect Battery has its advantages, but it has a major drawback that reduces the performance capacity of your battery. You are basically trading a higher-capacity battery for a longer-life battery.

So, should you use it? If you’re worried about draining almost every bit of power out of your smartphone, Protect Battery probably isn’t for you. If you don’t mind paying for a battery replacement (or a new phone) after two to three years, you can definitely do without this feature.

However, if you prefer to keep your phone/battery as long as possible, Protect Battery is a step in the right direction.

Battery protection against optimal battery charging

Battery Optimizer is a battery management feature similar to Protect Battery in iOS 13 and later. Improves battery life by reducing the time it takes to fully charge the battery. Unlike Protect Battery, it uses machine learning to detect periods when your phone is likely to be left charging for a long time. The purpose of this algorithm is to ensure that your battery is still fully charged during a power outage.

However, there is no “best” approach, and it all depends on what works for you. Basically, you could replace Apple’s algorithm with the Bixby routine and it wouldn’t make any difference.

Limit the maximum charge to extend battery life

Due to the relatively recent trend of non-removable batteries in smartphones and laptops, battery replacement has never been more expensive than it is today. Therefore, it has become more important to maximize the life of these batteries by using battery protection features. If you plan to keep your smartphone for more than a few years, leave Protect Battery on.