How To Tell If Your iPhone Needs a New Battery

If your iPhone isn’t holding a charge like it used to, you’re not alone. Batteries naturally wear down over time, and even with proper care, every iPhone battery has a limited lifespan. At Phone MD in Waco, Texas, battery replacements are one of our most common services—and in many cases, a fresh battery can make your phone feel brand new. Here’s how to know if it’s time to replace yours.

1. Your iPhone Battery Drains Too Quickly

One of the most obvious signs is rapid battery drain. If your battery percentage drops quickly—even when you’re not using your phone—or dies before the end of the day, it’s a clear signal your battery is aging. Even light use shouldn’t require multiple charges in one day.

2. The Phone Shuts Down Unexpectedly

If your phone shuts off even when it shows 20% or 30% battery remaining, that’s a red flag. This happens when the battery can’t supply consistent voltage under load. Sudden shutdowns are one of the most frustrating symptoms of battery failure and typically mean your iPhone needs immediate service.

3. Your iPhone Feels Sluggish

Believe it or not, a weak battery can make your iPhone feel slow. Apple’s iOS software will throttle performance on phones with degraded batteries to prevent sudden shutdowns. If your apps lag, animations stutter, or your phone feels generally unresponsive, the battery could be the root cause.

4. Your Battery Health is Below 80%

You can check your iPhone’s battery health by going to: Settings > Battery > Battery Health & Charging If your Maximum Capacity is under 80%, Apple recommends replacing the battery. You may also see a message that says, “Your battery’s health is significantly degraded.”

This diagnostic is a built-in way to know exactly how your battery is holding up—no guesswork needed.

5. The Battery Is Swollen or the Screen Is Lifting

A swollen battery can cause your phone’s screen to lift from the frame or make the phone feel slightly bloated. This is dangerous and should be addressed immediately, as swelling can lead to further damage or even pose a safety risk. If you notice your screen bulging or feel pressure when pressing the display, stop using the phone and bring it in for service right away.

6. It Charges Slowly or Won’t Hold a Charge

Slow charging or trouble holding a charge could indicate a battery issue—or a problem with the charging port or cable. At Phone MD, we’ll perform a quick diagnostic to determine whether the battery or another component is to blame, saving you time and money.

7. Your iPhone Is More Than Two Years Old

Most iPhone batteries are rated for around 500 full charge cycles, which typically lasts 18–24 months with normal use. If your phone is older than that and showing any of the symptoms above, replacing the battery could restore its performance and extend its life.

Why Choose Phone MD for iPhone Battery Replacement in Waco?

• Same-day battery replacements

• Genuine-quality parts and expert repair techs

• Affordable pricing with no appointment needed

• Fast, local service you can trust

Whether your battery is just wearing out or you’re experiencing sudden shutdowns, we’ve helped thousands of Waco residents breathe new life into their iPhones with a simple battery replacement.

Ready to power up? Stop by Phone MD in Waco today for a quick battery diagnostic or same-day replacement.