MacBook battery – replacement, lifespan and signs of failure
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Quick answer
A MacBook battery typically needs replacing after 800–1,000 full charge cycles or 4–5 years of use. If you see 'Service Battery', short battery life, or a swollen battery, it needs replacing — not repairing. We replace batteries on every MacBook model with original or quality-approved cells, and a warranty.
Why does your MacBook only last an hour?
When a MacBook no longer holds charge like new, it’s almost always the battery — not macOS, not an app, and rarely a hardware issue elsewhere. Lithium-ion cells lose capacity over time, and after 4–5 years or 1,000 full charge cycles, capacity has typically dropped 20–40%.
The clearest signs that your battery needs replacing:
- “Service Battery” or “Replace Soon” in System Information
- Spontaneous shutdowns — often when the battery shows 20–30% but is actually empty
- Rapid drain — from 100% to 0% in under 2 hours of light use
- Visible bulging on the underside, or a trackpad that “clicks poorly”
- No charging even when the charger is plugged in and working
What does a MacBook battery replacement cost?
Between DKK 1,000 and DKK 2,600 depending on model:
- Older Unibody / MacBook Air 11”: DKK 1,000-1,200
- MacBook Pro 13” Retina (2012-2015): DKK 1,300-1,500
- MacBook Pro 15” Retina (2012-2015): DKK 1,500-1,700
- MacBook Pro 13” Touch Bar / M1 / M2: DKK 1,900-2,200
- MacBook Air M1 / M2 / M3 (13”/15”): DKK 1,800-2,100
- MacBook Pro 14” / 16” M-series: DKK 2,000-2,600
All prices include a quality battery, labour and 2 years’ warranty. See the current price for your specific model at macmo.dk/reparation — diagnosis is free and you get a fixed quote before we start.
Where can I get a MacBook battery replaced?
We specialise in Apple hardware and have experience with every MacBook model — including the tricky glued Pro batteries. We use original or quality-approved cells, you get a warranty, and you can typically have it back the same day or the next.
Unlike general PC workshops, we know exactly how to disassemble a MacBook without damaging the keyboard, trackpad or display cable — and we handle swollen batteries (which are a safety hazard) safely.
How to extend your battery’s lifespan
Until you replace the battery, you can extend its life with these tips:
- Use Optimised Battery Charging (on by default in newer macOS). It learns your habits and holds the battery at 80% until you need it.
- Avoid being constantly at 100%. Batteries wear fastest when stored fully charged at high temperatures.
- Keep the MacBook cool. Use it on a flat, hard surface so the fans can draw air. See our guide to overheating and fans.
- Disable heavy background apps. Check Activity Monitor for energy hogs.
- Don’t store your MacBook empty for months. If you’re putting it away, charge it to about 50% first.
How to check your MacBook battery's health
⏱ PT2M
- Open the Apple menu. Click the in the top-left corner and select 'About This Mac'.
- Open System Information. Click 'More Info...' or 'System Report' (depending on your macOS version).
- Find the battery section. Select 'Power' in the left sidebar under Hardware.
- Read the Cycle Count and Condition. If 'Cycle Count' is above 1,000, or 'Condition' shows 'Service Recommended' or 'Replace Soon', it's time for a replacement.
- Book a repair. Get in touch with us for a no-obligation quote on a battery replacement.