Common Applications
This integrated circuit is widely utilized by technicians to repair charging and power faults in smartphones from several brands:
- Xiaomi / Redmi (e.g., Redmi 13, Redmi 9C, Poco C3)
- Tecno
- Infinix
- Oppo
- Vivo
Issues Fixed by Replacing This IC
Replacing a faulty BQ21120 chip typically resolves specific hardware issues, including:
- No charging or slow charging problems
- Fake charging (phone shows charging icon but battery percentage does not increase)
- Battery not detected errors
- Dead phone states caused by a shorted Power Management IC (PMIC) line
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