5 Signs Your iPhone Battery Needs Replacing

Every iPhone battery degrades over time. After about 500 charge cycles, your battery retains roughly 80% of its original capacity. But how do you know when it's actually time to get it replaced? Here are the five clearest signs.

1. Your Phone Dies Before the Day Ends

If you used to get through a full day on a single charge and now you're reaching for your charger by lunchtime, your battery is losing its ability to hold charge. This is the most common sign of battery wear.

2. Unexpected Shutdowns

Does your iPhone randomly switch off — even when the battery shows 20% or more? This happens when the battery can no longer deliver the power your phone needs. Apple may even show a "performance management" warning in Settings > Battery > Battery Health.

3. Your Phone Gets Unusually Hot

While some warmth during heavy use is normal, if your phone frequently gets hot during basic tasks like texting or browsing, the battery may be swelling or failing. A swelling battery is a safety concern — get it checked immediately.

4. Battery Health Below 80%

Go to Settings > Battery > Battery Health & Charging. If your Maximum Capacity is below 80%, Apple considers the battery significantly degraded. You may also see a message recommending service.

5. Slow Performance

Apple throttles CPU performance on iPhones with degraded batteries to prevent unexpected shutdowns. If your phone feels sluggish and laggy, a new battery might restore its speed — no need for a whole new phone.

What Should You Do?

If you're experiencing any of these signs, a battery replacement is one of the most cost-effective repairs you can get. At Gary's Tech Hub, we replace iPhone batteries in as little as 20 minutes:

• Battery replacement from just €39
• Premium-quality cells that meet or exceed OEM specs
• 12-month warranty on all battery replacements
• Walk in — no appointment needed
• Done while you wait or shop in Killiney Shopping Centre

Don't suffer with a dying phone. Pop into Unit 12 at Killiney Shopping Centre, or book online and we'll have you sorted in no time.