Smartphone ailing? Here's how to check your battery's health (2024)

You know by now your phone's battery performance degrades the older it gets. That's just how lithium-ion batteries work, unfortunately. With each charging cycle, they wear down a bit. Eventually, it becomes too big a problem to ignore.

Let's look at the symptoms – and see how to check your battery health.

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Signs you can’t ignore

◾ Your phone’s battery used to stay charged for over a day. Now, you're looking for an outlet by the afternoon.

◾ You unplug your phone, only to see the battery level drop quickly, even though you're not doing anything unusual.

◾ You leave your phone plugged in for hours, but it never returns to a full charge.

◾ Your phone is off-the-charts hot when it’s charging. You may even notice a physical bulge. Unplug it immediately if this happens, or you risk a fire or worse.

Smartphone ailing? Here's how to check your battery's health (1)

Apple makes it easy

It’s simple to see if your iPhone battery is struggling with a few clicks.

◾ Open Settings > Battery > Battery Health & Charging.

At the top, you'll see your battery's maximum capacity. Don't panic if it's below 100%. Your battery’s designed to maintain 80% of its original capacity by 500 charges so that that percentage will tick down over time.

Under Peak Performance Capability, you'll see whether your battery is operating normally. If it’s seriously degraded, you'll see a message here.

It’s a little trickier on an Android

Most manufacturers have different steps. Here are a few to try:

◾ Open the Phone app, dial *#*#4636#*#* and look for an option to check your battery health. If you don't see it, try another option.

◾ On Samsung, open the built-in Samsung Members app. Tap Get Help > Check Android battery health.

◾ Apps like AccuBattery can provide a good estimate if all else fails.

Sorry, but your laptop battery won't last forever, either. Here’s how to check yours.

Charge better

No matter how old your phone is, a few tips and tricks can help you get the most out of that battery.

Don’t rely on knock-off chargers

High-quality chargers have circuits inside of them that switch off when there’s too much power draw. This protects your phone battery from overcharging, breaking, or overheating.

Heat is your battery’s biggest enemy. Some cheap chargers and cables have even led to fire and injuries. Saving money is excellent, but don’t skimp on quality here.

Be careful with power banks

Cheap power banks can ruin your battery over time. Be sure any power bank you use has overcharge protection. If not, you can still use it, but keep an eye out. Once your battery is almost full, unplug it.

It’s best to avoid power banks with quick charge options unless they’re from a reliable brand. Here’s a rule of thumb: Say no if you’ve never heard of it.

Don’t download battery-draining apps

Lithium-ion and lithium-polymer phone batteries only have limited charging cycles before they degrade. This is why most people encounter battery problems after two years of use.

There’s nothing you can do about your battery wearing down eventually, but some things have more of an impact. If you have performance apps that monitor your battery life, they could harm it in the long run. These apps constantly use power to monitor your battery life.

Don’t use your phone while it’s charging

Your phone is at 1%, so you plug it in. Leave it alone! Using your phone while charging can rapidly increase the temperature, putting strain on your battery, screen, and processor.

Take it out of the case

When it comes to charging, phone cases can cause temperature problems. When your phone battery heats up too much, it can cause damage to the rest of your phone. To be safe, take the case off while you charge – especially if you notice your phone heats up while it’s plugged in.

Keep your tech-know going

My popular podcast is called “Kim Komando Today.” It’s a solid 30 minutes of tech news, tips, and callers with tech questions like you from all over the country. Search for it wherever you get your podcasts. For your convenience, hit the link below for a recent episode.

PODCAST PICK:This fear keeps Sam Altman up at night

Plus, your AI girlfriend collects a lot of data. Kim and Andrew also talk about the White House's plan to tackle deepfakes and take a look back at the first kiss ever recorded.

Check out my podcast “Kim Komando Today” on Apple, Google Podcasts, Spotify, or your favorite podcast player.

Listen to the podcast here or wherever you get your podcasts. Just search for my last name, “Komando.”

Learn about all the latest technology on theKim Komando Show, the nation's largest weekend radio talk show. Kim takes calls and dispenses advice on today's digital lifestyle, from smartphones and tablets to online privacy and data hacks. For her daily tips, free newsletters and more, visit her website.

Smartphone ailing? Here's how to check your battery's health (2024)

FAQs

Smartphone ailing? Here's how to check your battery's health? ›

Open Settings > Battery > Battery Health & Charging. At the top, you'll see your battery's maximum capacity. Don't panic if it's below 100%. Your battery's designed to maintain 80% of its original capacity by 500 charges so that that percentage will tick down over time.

What is the code for battery check on Android phone? ›

Here's how you can use the Phone app to check the battery information of your Android mobile phone. Open the Phone app on your smartphone and input *#*#4636#*#* in the dial pad. In the testing menu that pops up, look for Battery Information for details like charge level, battery temperature and health.

How do I reset my phone battery health? ›

Recalibrating the battery on Android is very simple, just follow these steps:
  1. Charge the device to 100% and leave it charging for another one or two hours, without using it.
  2. Disconnect the charger and use the smartphone normally, until it reaches 0% and turns off.
  3. Charge it again to 100%
Feb 26, 2024

How do I check my battery health on my Samsung? ›

You can check your battery status and optimise its usage in seconds.
  1. Open Samsung Members App and tap "Support" on the bottom.
  2. Check your battery status through "Phone diagnostics".
  3. Tap "Test all".

How do I know if my cell phone battery needs replacing? ›

There are signs you can look for in order to plan for a replacement.
  1. Sluggish Performance. You might start noticing that your phone is responding slower to taps or prompts. ...
  2. Increased Battery Drain. ...
  3. Won't Hold A Charge.

What does *#0228 do? ›

To check the battery level of your Samsung phone, you have two options: enter the secret code *#0228# or via the diagnostic function. The latter can be accessed through the settings or the Samsung Members app.

What is the function of *#9900 Samsung code? ›

*#9900# is often referred to as the "sysdump" or "sysdump mode" code. When entered into the dialer and called, it opens a system dump menu on the device. The system dump is essentially a log of system-level information and error messages from the phone's operating system and apps.

What is *#30 used for? ›

Code *#06# is available for both iPhone and Android users. By pressing it, you can see your International Mobile Equipment Identity number, or, as it shortly called, IMEI. The code *#30# will help you turn your number identification on or off.

How can I make my phone battery healthy again? ›

Stretch a low battery
  1. Turn on battery saver or low power mode. Some Android phones come with a battery saver or low power mode, which helps a charge last longer. ...
  2. Avoid actions that keep the screen on. ...
  3. Avoid constant internet connection. ...
  4. Avoid actions that process too much information. ...
  5. Limit connectivity & location.

Does resetting a phone improve battery? ›

Restart your phone - Restarting can sometimes fix battery related problems. Long press the power button and tap Restart in the prompt. Restart method varies across devices - check user manual or manufacturer support pages. Update Android - Updating to the latest Android version can potentially fix battery issues.

Can we check battery health on Android? ›

Open the phone app and enter *#*#4636#*#*. This will open a "Testing" menu that may include a "Battery information" section. You'll see the battery health listed here.

How do I know if my Samsung phone needs a new battery? ›

If your phone won't charge to 100%, drains quickly after you've charged it, or shuts down unexpectedly on a full charge, it's probably time to replace the battery. Likewise, if you have to charge your Android more than once a day or if it only works when it's plugged in, it's may be time for a new battery.

What battery health is bad for Samsung? ›

Main tile view
StatusBattery
Good75% and higher
Normal55 to 75%
Bad55% and lower
Apr 3, 2024

How do I know if my phone battery is in good condition? ›

Open Settings > Battery > Battery Health & Charging. At the top, you'll see your battery's maximum capacity. Don't panic if it's below 100%. Your battery's designed to maintain 80% of its original capacity by 500 charges so that that percentage will tick down over time.

How do you check if your battery is bad on your phone? ›

Most Android phone models have a battery usage setting where you can check battery health. Go to Settings > Battery to check your current battery level. From there the steps vary by device, but look for an option like Battery Usage to get more information, like which apps are using the most power.

How do I make sure my battery is healthy? ›

Depending on your device, you can:
  1. Let your screen turn off sooner.
  2. Reduce screen brightness.
  3. Set the brightness to change automatically.
  4. Turn off keyboard sounds or vibrations.
  5. Restrict apps with high battery use.
  6. Turn on adaptive battery.
  7. Delete unused accounts.
  8. Turn on dark theme.

What battery percentage should I keep my phone at? ›

The best practice for preserving phone battery health is to plug it in at around 20% and charge it up to 80-90%. This is especially important if you use fast charging, as charging from 0% will cause a lot of heat, and from 80% up, fast charging becomes less efficient.

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