If your 5000mAh Mi Power Bank 2 is having trouble charging other devices or is charging them slowly, please refer to the following steps:
1. Ensure that the power bank has sufficient power. If the battery power is low, it may not charge other devices optimally;
2. Ensure that you are using the original charging cable. A damaged or low-quality cable may result in charging slowly;
3. Dust, lint, or debris in the charging ports can decrease the charge speed. Clean both the charging ports on the power bank and your other electronic devices;
4. Extreme temperatures, both hot and cold, can impact the charge speed. It is recommended to charge other devices with an ambient temperature between 32°F to 95°F (0℃ to 35℃);
5. Try charging different devices to see if the issue originated from the power bank.
If the above troubleshooting methods can’t resolve the issue, please contact our local official service center or your seller for further assistance. They will help you in this regard.