Why battery health matters
Battery health is the most direct indicator of whether your phone battery needs replacing. A phone that dies by 2pm, shuts down unexpectedly, or charges painfully slowly is almost always suffering from degraded battery health. A battery replacement for most phones costs $35–$98 in Singapore and takes 30–45 minutes.
How to check battery health
iPhone
Settings → Battery → Battery Health & Charging. Apple recommends battery replacement when health drops below 80%.
- 100–90%: Good. No action needed.
- 89–80%: Noticeable degradation. Consider replacement if battery life bothers you.
- Below 80%: Apple officially recommends replacement. Performance Management may be active.
- Service warning shown: Replace now.
Samsung & Android
- Dial *#0228# on Samsung devices for a battery diagnostic screen
- Use AccuBattery — measures actual charge capacity over several cycles
- Ask a repair shop — we can read battery health from diagnostic tools in-store
“Original”, “OEM”, and “genuine” battery — what these terms actually mean
| Term | What it actually means | Realistic expectation |
|---|---|---|
| Original / OEM / Genuine | The exact same battery Apple or Samsung ships in the phone. Only from brand service centres. | Extremely rare from independent shops at low prices. |
| Grade A / OEM-equivalent | Manufactured to the same spec — same rated capacity, safety certifications, performance. | What Certified Phone Repair uses. 90-day warranty. |
| Aftermarket / generic | Unknown quality, often overrated capacity, higher swelling risk in Singapore’s heat. | A suspiciously cheap battery repair is usually this. |
⚠️ The Apple battery notification: From iPhone 14 onwards, iOS shows a message in Settings → General → About if the battery is not Apple-certified. This does not mean the battery is unsafe — Grade A batteries will trigger this. It does not affect phone function.
Signs your battery needs replacing
- Phone dies at 15–30% charge — the battery can’t hold charge consistently
- Battery percentage jumps — drops suddenly from 40% to 10% without explanation
- Phone shuts down unexpectedly under load — gaming, calls, camera
- Very slow charging — the battery’s internal resistance has increased
- Phone feels warm even at idle — degraded cells generate more heat
- Swollen back panel — a failing battery expanding from gas buildup. Replace immediately.
🔴 Swollen battery — do not ignore this. If your phone back panel is lifting or the screen is being pushed out, the battery is swollen. Do not charge it. Bring it in immediately — swollen lithium batteries can catch fire.
Related terms
- Battery Cycle Count — how usage patterns affect degradation
- Swollen Battery — a safety issue that needs immediate attention
- Grade A Battery — full breakdown of OEM vs Grade A vs aftermarket
Further reading
- 5 Signs Your Phone Battery Needs Replacement — clear warning signs explained
- How to Make Your Phone Battery Last All Day: 15 Proven Tips — extend your battery life in Singapore
- Phone Won’t Turn On? 7 Reasons Why — dead battery is the most common cause
