The Samsung Galaxy S21 is an extremely capable Android phone — for as long as its battery lasts. Overall, Samsung got a lot right with the S21. It has a stunning 120Hz AMOLED display, great cameras, and blistering-fast performance. Almost everything about the Galaxy S21 is top-notch, but battery life can be a potential pain point. The 4,000mAh capacity is enough for most people to get through a full day of normal use, but for s with especially demanding workflows, the S21 can leave something to be desired. While there's no way to magically improve battery life on the S21, there are steps s can take to help it last as long as possible per charge.
For starters, it's worth using closing unneeded background apps, looking for any unusually high battery usage, and detecting any app crashes. This doesn't need to be done all the time, but it's a good idea to run one of these optimization checks every once in a while (or whenever the S21 starts losing battery life faster than expected).
Galaxy S21 Battery-Saving Tips
On that same Device Care page, tap the 'Battery' button to view the full battery settings for the Galaxy S21. Along with showing the phone's remaining battery life and current usage, there are also a few additional battery-saving tools to take advantage of.
The first feature that's shown is 'Power saving mode' that, while not something to be enabled 24/7, is a great way to extend the S21's battery life for those times when it's getting low and a charger isn't to hand. It can be enabled right from the Battery page by tapping the toggle next to it, but by tapping the 'Power saving mode' name, s are shown a more in-depth page of how it works. There are also settings to customize how Power saving mode works, such as having it turn off the always-on display, limit U speed to 70 percent, decreasing display brightness by 10 percent, and more.
s can also tap the 'Background usage limits' option on the Battery page, with this allowing them to select apps that should be put to sleep or put to deep sleep. Most s probably don't need apps like Best Buy or Netflix constantly running in the background, so making sure they're added to these lists is a smart move. The Galaxy S21 automatically adds apps to these lists as it sees fit, but s can also go in and add/remove them as they see fit. Once again on the Battery page, tap 'More battery settings' and double-check that 'Adaptive battery' is enabled. When on, the feature "Limits battery usage for apps that you don't use often."
Change Galaxy S21 Display Settings
Tweaking the Galaxy S21's display settings can also improve battery life. While the 120Hz refresh rate does look amazing, it's also a considerable strain on the phone's battery. If someone is trying to make their S21 last as long as physically possible, turning off the 120Hz refresh rate is an option to consider. To do this, open the Settings app, tap 'Display,' tap 'Motion smoothness,' tap 'Standard,' and then tap 'Apply.'
The Galaxy S21 has an Always On display that shows glanceable information like the time, date, battery level, and more while the screen is off. While the Always On display isn't a battery guzzler, it does affect the battery life. s can turn off the Always On display when they want to extend their Galaxy S21's battery. To do this, open the Settings app and search for 'Always On Display.' Tap on the option to select it, and turn off the toggle to disable the feature.
Galaxy S21 s can also modify other display settings, such as reducing the screen brightness when not required. Some s prefer using their phones at full brightness even indoors or in low light, but this can drain the battery and cause eye strain. To reduce the brightness, swipe down from the top to view the notifications menu and use the slider to change brightness. s can also adjust screen timeout settings so that the display turns off quicker when not in use. To do this, open Settings and tap 'Display.' Select 'Screen Timeout' and set 'Screen Timeout time' to 15 seconds. With all of those tips in mind, the Galaxy S21 should be at peak battery performance.
Source: Samsung