Electrical safety
Unplug chargers after use and stop for abnormal heat
Unplug after charging; stop for excessive heat, discolouration, deformation, or a burning smell.
Last reviewed: 2026-10-12
Why it matters
Long connection or abnormal overheating can damage a charger and cause fire.
Wrong action
Unsafe: Leaving an unused charger connected or covering it with bedding or cloth.
Correct action
Unplug after charging; stop for excessive heat, discolouration, deformation, or a burning smell.
What to do
- Follow the manual, switch off first, and keep hands dry.
- Unplug after charging; stop for excessive heat, discolouration, deformation, or a burning smell.
- Charge on a hard ventilated surface, unplug afterward, and inspect the casing. Afterward, recheck the plug, cord, and appliance body.
If something happens
For smoke, fire, or electric shock, keep clear, isolate power only if safe, and call 999. Do not touch a casualty while they may still be connected to electricity. Once power is safely isolated, follow dispatcher first aid; if unresponsive and not breathing normally, begin CPR as instructed.
Sources and review
- Electrical and Mechanical Services Department — Additional Safety Tips for Individual Electrical Appliances
Last reviewed: 2026-08-20 - Electrical and Mechanical Services Department — Household Electrical Safety Handbook
Last reviewed: 2026-10-12 - Hong Kong Fire Services Department — Post-dispatch Advice
Last reviewed: 2026-10-12
This page provides general home-safety information and does not replace medical, legal, electrical, or other professional advice.
Related safety lessons
Standard safety ruleElectrical safety
Keep appliance ventilation spaces clear
Leave the space required by the manual and never cover air inlets or outlets.
View safety lesson →
Critical safety ruleElectrical safety
Do not overload extension boards or adaptors
Connect only one extension unit or adaptor to each wall socket; use a separate fixed socket for high-power appliances.
View safety lesson →