If the Xiaomi 212W HyperCharge Power Bank 25000 is unable to charge your phone, it can be due to the power bank's battery being too low after being left unused for an extended period (more than 7 days). In such cases, the voltage can become abnormal, preventing the power bank from charging your phone. To resolve this, try immediately using the original charging cable to recharge the power bank while simultaneously charging your phone. Within 40 minutes to 2 hours, the power bank should return to normal operation. If the issue persists, try disconnecting and reconnecting the cable, extending the recharging time to help revive the power bank.
Note:
It’s always recommended to refer to the actual product for more details on care and maintenance.