Issue: You recently purchased a Nitecore NB20000 Gen3 power bank and want to charge two devices simultaneously. However, when you plug one device into the USB-C port, it charges fine, but adding a second device to charge causes the first port to power off.
Possible Causes:
- The power bank requires time to redistribute power between the two ports when a second device is connected.
- The combined demand of the connected devices may exceed the power bank’s maximum output capacity for dual charging.
Steps to Troubleshoot:
- Wait for Redistribution:
- After plugging in the second device, wait for 1-2 minutes and then check the charging status of both devices.
- The power bank temporarily pauses the output to redistribute power between the two ports and should resume shortly after.
- Verify Power Requirements:
- Check the power requirements of both connected devices.
- The maximum output during dual charging is 3A/15W as per the power bank’s specifications.
- If one or both devices demand more power than the specified limit, the power bank might pause or stop output to one port to prevent overloading.
A short explanation
Once you connect the 2nd device to the power bank, can you wait for 1-2 minutes and then check the charging status? The power bank needs to redistribute the output between the two ports. It will temporarily pause the output and resume shortly after. Additionally, the maximum output current/output during the dual charging is 3A/15W according to the specification. The power bank might pause one port if the demand of the other port exceeds this limit.