The Samsung Galaxy S21 is a premium device — fast, sleek, and powerful. But even the best phones eventually run into battery problems. If your S21 is dying quickly, heating up, or shutting down randomly, it’s likely time for a battery replacement.
At Gary’s Computer Repair Service, we provide fast, professional Samsung battery replacement across Dublin — restoring your phone’s battery life without affecting your data or screen.
🔍 Common Signs You Need a New Battery
1️⃣ Your Phone Doesn’t Last the Day
If your S21 used to last 10+ hours but now barely makes it to lunch, the battery health has likely degraded.
2️⃣ Phone Shuts Down at Random Battery Levels
Powering off at 30% or 50% is a clear sign of a worn-out battery.
3️⃣ Device Feels Hot During Use or Charging
Heat buildup is a symptom of battery strain or failure.
4️⃣ Bulging or Lifting Screen
A swollen battery can push against the screen — this is dangerous and needs urgent replacement.
5️⃣ Charging Takes Too Long or Doesn’t Complete
Slow or inconsistent charging may not be the cable — it could be the battery itself.
🛠️ Our Battery Replacement Process
✅ Battery Health Diagnosis
We run a full diagnostic to confirm the battery’s condition and check for software-related power drain.
✅ Genuine Samsung Battery Replacement
We install high-quality OEM or Samsung-authorized batteries for performance and safety.
✅ Safe, Screen-Friendly Service
We carefully remove the S21’s screen without damaging it — preserving the original display and fingerprint sensor.
✅ Post-Replacement Testing
We check charge speed, temperature, and standby performance to confirm your phone is back at peak condition.
✅ No Data Loss Guarantee
Your apps, messages, photos, and settings stay exactly where you left them.
📱 Supported Models
- Samsung Galaxy S21
- Galaxy S21+
- Galaxy S21 Ultra
- Galaxy S21 FE