iPhone Repair
iPhone Battery Replacement
An iPhone battery that barely makes it through the day is more than an inconvenience — Apple's performance throttling can slow your whole device to protect a degraded cell. At Mr Gadget in Rickmansworth we replace iPhone batteries on all current and recent models including iPhone 12 through iPhone 16 Pro Max, typically in under an hour.
We fit genuine-capacity lithium-ion cells that reset your battery health indicator to 100% and disable throttling. After the swap we run a full charge-discharge cycle check and confirm the Battery Health screen shows the correct status. All battery replacements carry a 12-month warranty.
Book This Repair →Common Symptoms
Do Any of These Sound Familiar?
These are the exact phrases our customers search for before they visit us — if you recognise any of them, bring your device in for a free assessment.
Walk in Mon–Sat 9am–5pm or book your repair online. No appointment needed.
Why Mr Gadget
What Makes Us Different
Battery swaps take under an hour on most models — you don't need to leave your device overnight.
We fit cells matched to the original mAh or Wh rating — battery health resets to 100%.
Parts and labour covered for 12 months — no hidden charges.
We verify charge speed, health indicator, and wireless charging after the swap.
How It Works
Our Repair Process
Walk in to our Rickmansworth store — no booking required.
We confirm battery health percentage and check for swelling or secondary faults.
The old cell is carefully removed and a new full-capacity battery is installed.
Charge speed, health percentage, and all charging modes are verified before return.
Areas We Cover
Serving 24 Local Towns
Based in Rickmansworth, we serve customers from across South West Hertfordshire and North West London. Click your nearest town to see all available repairs and town-specific pages.
✓Rickmansworth▼
✓Watford▼
✓Chorleywood▼
✓Croxley Green▼
✓Northwood▼
✓Harefield▼
✓Chalfont St Peter▼
✓Bushey▼
✓Moor Park▼
✓Pinner▼
✓Harrow▼
✓Gerrards Cross▼
✓Leavesden▼
✓Garston▼
✓Ruislip▼
✓Kings Langley▼
✓Abbots Langley▼
✓South Oxhey▼
✓Denham▼
✓Carpenders Park▼
✓Maple Cross▼
✓Mill End▼
✓Northwood Hills▼
FAQ
Frequently Asked Questions
Most models take under an hour. We'll confirm the time when you drop off.
Yes — a new cell resets the battery health indicator to 100%.
No — walk-ins are welcome Mon–Sat 9am–5pm at our Rickmansworth store.
All battery replacements carry a 12-month warranty on parts and labour.
Yes — we verify charging speed, battery indicator accuracy, and all associated features after the swap.
Ready to Get Your iPhone Fixed?
Walk in Mon–Sat 9am–5pm — no appointment needed. Or book online, call us, or message on WhatsApp.
Book Online WhatsApp 07711 272860 📞 01923 934966