PHONEDOCTOR GLOSSARY
Battery & Power Repair Terms
4 terms that explain why your phone won’t charge or dies too fast.
BATTERY CONDITION
Battery Health
A percentage showing how much capacity your battery retains vs when it was new. Below 80% on an iPhone triggers CPU throttling — the phone feels slow, not just short on charge.
Read definition →BATTERY WEAR
Battery Cycle
One complete charge from 0–100%. Most phone batteries are rated for 300–500 cycles before significant capacity loss. Singapore’s heat accelerates degradation faster than cooler climates.
Read definition →PHYSICAL CONNECTOR
Charging Port
The socket you plug your cable into — Lightning on older iPhones, USB-C on iPhone 15+ and most Android phones. Lint, damage, and corrosion are the main causes of failure.
Read definition →BOARD-LEVEL CHIP
Power IC
The chip on the logic board managing power to every component. When it fails: the phone won’t charge, won’t power on, or drains fast — even with a brand new battery fitted.
Read definition →Phone not charging or dying fast?
PhoneDoctor replaces batteries and charging ports for all phone brands. OEM parts, 90-day warranty, 45-minute service.