Phone Charging Troubleshooting Worksheet

A customer complains that their phone only charges when the cable is bent at a certain angle. What is the most likely cause?

• Swollen battery

• Dirty or damaged charging port

• Faulty screen

• Corrupt software

A phone shows the charging symbol, but the battery percentage keeps dropping. This is known as:

• Rapid discharge

• False charging

• Short circuit

• Boot loop

After cleaning the charging port and changing the cable, the phone still does not charge. What component may be faulty?

• SIM tray

• Speaker

• Charging IC

• Camera lens

A phone displays “Slow Charging” even with an original charger. What could be the cause?

• Strong network signal

• Corroded or bent USB-C pins

• Updated software

• Loud speaker

Dust and pocket lint in the charging port usually cause:

• Overheating

• Poor cable contact

• Screen flickering

• SIM error

A technician confirms the charging IC is faulty. What type of repair is required?

• Screen replacement

• Battery calibration

A phone battery drops from 80% to 30% within 20 minutes of browsing. This indicates:

• Charging IC failure

• Rapid discharge

• Dirty charging port

• Broken speaker

A customer notices the back of their phone is pushing outward. What is the likely cause?

• Strong Wi-Fi

• Swollen lithium-ion battery

• Updated OS

• Loose SIM

A phone shuts down at 20% battery level. What is the likely reason?

• Good battery health

• Degraded battery unable to maintain stable voltage

• Charging cable problem

• Screen fault

Lithium-ion batteries typically show significant wear after:

• 6 months

• 1 year

• 2–3 years

• 10 years