Top 5 Signs Your MacBook Battery Needs Replacing

Your MacBook battery isn’t built to last forever. Over time, it will start to show signs of wear — and if you rely on your Mac for work or daily tasks, a failing battery can be a real headache. Here are five clear signs it might be time to book a replacement.

1. Your Battery Doesn’t Hold Charge Like It Used To

If your Mac used to last 6–8 hours and now struggles to hit 2, your battery cells may be degraded. A full charge should get you through a good chunk of the day — anything less is a red flag.

2. macOS Says “Service Recommended”

Click the battery icon in the menu bar or head to System Settings > Battery > Battery Health. If you see “Service Recommended” or your cycle count is high (typically over 1000), Apple is telling you it’s time.

3. Sudden Shutdowns or Power Drops

If your MacBook randomly shuts off when unplugged — even with 20–30% battery left — it's a classic sign of a failing battery. The internal voltage can’t keep up with the demand, and your Mac panics.

4. Swollen or Misshapen Case

A swollen battery can push against the MacBook's casing, trackpad, or keyboard. If you notice your trackpad is raised or your Mac doesn’t sit flat, stop using it immediately — swelling can lead to serious safety risks.

5. Slower Performance When Unplugged

MacBooks will sometimes throttle CPU performance on battery power to protect aging cells. If you notice your Mac runs fine when plugged in but gets sluggish when on battery, it could be trying to preserve what’s left of a dying battery.

MacBook Battery Replacement in Hampshire & Dorset

If your MacBook battery is starting to fail, don’t wait for it to get worse. I offer expert MacBook battery replacements for models old and new — with fast turnaround and support tailored to home users and small businesses.

Based in Hampshire and Dorset, with postage options available across the UK. Book in for a quick chat or get in touch for advice.