Your phone can tell you how worn its battery is — you just need to know where to look. On an iPhone it takes a few taps in Settings; on Android the location depends on the maker, and some models only show a basic status. Here’s how to find it, what the numbers mean, and when a replacement is worth considering.

The short version

  • iPhone: open Settings, tap Battery, then Battery Health (called Battery Health & Charging on many recent versions).
  • Samsung Galaxy: the Samsung Members app has a battery diagnostic; some newer models also show battery information in Settings.
  • Google Pixel and other Android phones: search “battery health” in Settings — if nothing comes up, your model may not report it.
  • Numbers are a guide, not the whole story. Sudden shutdowns, swelling or a battery that drains in a few hours matter more than a percentage.

What “battery health” actually means

Every lithium-ion battery slowly loses capacity as it goes through charge cycles. Battery health is a comparison between how much charge the battery can hold today and how much it held when it was new. A phone showing 85% can hold roughly 85% of its original charge, so a full battery simply doesn’t last as long as it used to.

Wear is normal and gradual. Heat speeds it up, and so does spending long stretches at 0% or sitting at 100% in a hot place. That’s why two phones of the same age can show quite different numbers.

How to check battery health on an iPhone

  1. Open Settings.
  2. Tap Battery.
  3. Tap Battery Health (on many recent iOS versions it’s labelled Battery Health & Charging).

You’ll see Maximum Capacity as a percentage. Depending on your model and iOS version you may also see a short status message, and if the battery is significantly worn, iOS can recommend a service. On some newer iPhones you’ll also find the cycle count and the battery’s manufacture date in Settings under General, then About.

Apple says batteries in iPhone 14 and earlier models are designed to keep 80% of their original capacity at 500 complete charge cycles, and iPhone 15 and later models at 1,000 cycles. A “complete cycle” means using 100% of the battery’s capacity in total, which can be spread across several partial charges.

If you don’t see Battery Health at all, the phone may be running an older iOS version — update it first under Settings, General, Software Update.

How to check battery health on a Samsung Galaxy

Samsung phones don’t all show a percentage the way iPhones do, but there are two places to look:

  • Samsung Members app: open the app (it comes preinstalled on most Galaxy phones), go to the support or diagnostics section and run the phone diagnostics. Choose the battery test and it will report the battery’s status and life.
  • Settings: on some newer models and One UI versions, battery information appears in Settings — the easiest way to find it is to use the search bar at the top of Settings and type “battery”.

Menus move around between One UI updates, so if a path doesn’t match exactly, searching inside Settings is the reliable route.

Google Pixel and other Android phones

Some newer Pixel models show a battery health screen in Settings under Battery. Older Pixels, and many phones from other makers, don’t report battery health to the user at all. Again, the quickest test is to open Settings and search “battery health”.

If your phone doesn’t offer it, you’ll see third-party apps in the Play Store that estimate battery capacity by watching how your phone charges over several days. Treat those numbers as rough estimates rather than an exact reading, and only install apps from developers you trust.

Signs your battery is worn, whatever the number says

A percentage is helpful, but how the phone behaves day to day is just as telling. Watch for:

  • The phone shuts off suddenly at 20% or 30%, especially in the cold.
  • You can’t get through an ordinary day that used to be easy — say, a commute into Downtown Vancouver and back plus some messaging.
  • The percentage jumps around, for example from 40% straight down to 10%.
  • The phone feels sluggish when the battery is low, or apps take longer to open than they used to.
  • The phone gets warm when you’re doing very little.

We cover more of these in 5 signs it’s time to replace your phone battery. If the problem is that the phone won’t charge at all, start with our checklist for a phone that’s not charging — a dirty port or a worn cable is often the real cause.

If your phone’s screen or back is lifting, the case no longer fits flat, or the phone looks puffy, the battery may be swelling. Stop charging it, don’t press on it or try to open it, and get it looked at as soon as you can.

Simple habits that slow battery wear

  • Avoid heat. Don’t leave your phone on a dashboard or in direct sun, and take it out of a thick case if it gets hot while charging.
  • Use the built-in charging options. iPhones have Optimized Battery Charging, and recent models offer a charge limit; many Android phones have a similar battery protection setting. Search “charging” or “battery protection” in Settings.
  • Don’t run it flat every day. Occasional drops to low battery are fine, but routinely hitting 0% adds wear.
  • Use a decent charger and cable. A damaged or poorly made cable can charge slowly or unreliably. See our chargers and cables if yours is fraying.
  • Keep software updated. Updates often include battery and charging improvements.

When is it worth replacing the battery?

There’s no single cut-off, but a battery replacement is worth thinking about when:

  • your iPhone shows a service recommendation or capacity around 80% or below,
  • the phone shuts down unexpectedly or can’t get through your normal day, or
  • you see any sign of swelling.

If the rest of the phone works well, a new battery can make it feel much closer to new for daily use. Before any repair, it’s a good idea to back up your phone so your photos and data are safe.

Battery replacement in Downtown Vancouver

If your battery health is low or your phone is behaving like the battery is on its way out, MyChoice Mobile Repair can take a look. Our kiosk is in Downtown Vancouver on Granville Street at 798 Granville St, open every day from 9 AM to midnight. We work on iPhone, Samsung and other major brands — see our battery replacement service, call (236) 785-8300 to check your model, or ask for a quote online.

Need a hand with your phone?

MyChoice Mobile Repair is a kiosk at 798 Granville St in Downtown Vancouver. Call us, message us or send a quote request.