The internal thermoelectric cooling fan may produce some noise when activated to assist with heat dissipation. When the product is in Boost Mode, the noise level remains below 29 decibels, which is sufficiently quiet for most daily use. When using the charger at night, especially in a bedroom, we recommend switching to Sleep Mode. This mode shuts off the fan and screen to provide a quiet, dark charging environment.
If you have any questions, please contact Anker Customer Support for further assistance.
