1. Introduction
The Nitecore NB20000 Gen III is a high-capacity, lightweight portable power bank designed for reliable power on the go. This manual provides essential information for the safe and efficient operation of your device, including features, setup, usage, and maintenance.
2. Key Features
- Enhanced Portability: The NB20000 Gen III is 13% shorter and significantly lighter than its predecessor, making it ideal for outdoor activities such as hiking, cycling, and climbing.
- High Capacity: Equipped with a 20,000mAh battery, providing extended power for smartphones, tablets, headlamps, and other compatible devices.
- Durable Construction: Crafted from woven carbon fiber material with a carbon fiber reinforced polymer frame, ensuring lightweight strength and durability. Features four corner cushions for impact resistance and a secure grip.
- Dual USB-C Ports: Offers simultaneous output from two USB-C ports, with up to 18W input and a maximum output of 22.5W.
- Pass-Through Charging: Allows charging of the power bank and connected devices concurrently.
- Multi-Protocol Compatibility: Supports popular fast charging protocols including QC, PD, FCP, and SCP for efficient device charging.
- Low Current Mode: Capable of charging low-current devices such as wireless headphones and wearables (minimum output: 60mA).
- Travel Ready: Certified for airline travel and features an IPX5 water resistance rating, suitable for various weather conditions.
3. Product Overview
Familiarize yourself with the components of your Nitecore NB20000 Gen III Power Bank.
- USB-C Ports (IN/OUT1, IN/OUT2): Used for both charging the power bank and charging external devices.
- Power Button: Activates the power bank and checks the battery level.
- LED Indicators: Four blue LED lights display the current power level and charging status.
4. Initial Setup and Charging the Power Bank
Before first use, it is recommended to fully charge your NB20000 Gen III Power Bank.
- Connect a USB-C charging cable to either of the USB-C ports (IN/OUT1 or IN/OUT2) on the power bank.
- Connect the other end of the cable to a compatible USB power adapter (not included).
- The LED indicators will illuminate and flash to show the charging progress. Once all four LEDs are constant-on, the power bank is fully charged.
The NB20000 Gen III supports up to 18W input for fast recharging.
5. Operating Instructions
5.1 Charging External Devices
- Connect your device's charging cable to one of the USB-C ports (IN/OUT1 or IN/OUT2) on the power bank.
- Connect the other end of the cable to your device.
- The power bank will automatically begin charging your device. The LED indicators will show the remaining power level.
The NB20000 Gen III can output up to 22.5W and supports various fast charging protocols for efficient charging.
5.2 Pass-Through Charging
The power bank supports pass-through charging, allowing it to be recharged while simultaneously charging external devices.
- Connect the power bank to a power adapter for recharging (as described in Section 4).
- Connect your external device to the other available USB-C port on the power bank.
- Both the power bank and your device will charge simultaneously.
5.3 Low Current Mode
To charge low-current devices (e.g., wireless headphones, smartwatches) that may not be detected by standard charging modes:
- With the power bank on, press and hold the power button for approximately 2 seconds until the first LED indicator starts flashing. This indicates entry into low current mode.
- Connect your low-current device to the power bank.
- To exit low current mode, press and hold the power button again for approximately 2 seconds. The LED indicator will stop flashing.
6. Power Level Display
The four blue LED indicators provide a clear indication of the power bank's remaining battery level.
| LED Indicators | Power Level |
|---|---|
| 4 Constant-on | 75% - 100% |
| 3 Constant-on | 50% - 75% |
| 2 Constant-on | 25% - 50% |
| 1 Constant-on | 10% - 25% |
| 1 Flashing | < 10% (Nearly depleted, recharge promptly) |
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Nitecore |
| Model | NB20000 Gen III |
| Battery Capacity | 20000 Milliamp Hours (mAh) |
| Connector Type | USB Type C |
| Input | Up to 18W (USB-C) |
| Output | Max 22.5W (Dual USB-C) |
| Special Features | Fast Charging, Slim Design, IPX5 Water Resistance, Low Current Mode |
| Voltage | 3.6V (Nominal) |
| Energy Density | 247mWh/g |
8. Maintenance
8.1 Cleaning
Wipe the power bank with a soft, dry cloth. Avoid using abrasive cleaners, solvents, or harsh chemicals.
8.2 Storage
Store the power bank in a cool, dry place away from direct sunlight and extreme temperatures. For long-term storage, it is recommended to charge the power bank to approximately 50-75% every three months to maintain battery health.
9. Safety Information
- Do not expose the power bank to water, fire, or extreme temperatures.
- Avoid dropping, puncturing, or disassembling the device.
- Keep out of reach of children.
- Use only compatible charging cables and adapters.
- If the power bank swells, emits smoke, or shows other abnormalities, discontinue use immediately.
- Dispose of the power bank responsibly according to local regulations.
10. Troubleshooting
10.1 Power Bank Not Charging
- Ensure the charging cable is securely connected to both the power bank and the power adapter.
- Verify that the power adapter is functioning correctly and connected to a live power source.
- Try a different USB-C cable or power adapter.
10.2 Device Not Charging from Power Bank
- Ensure the power bank has sufficient charge (check LED indicators).
- Verify the charging cable is securely connected to both the power bank and your device.
- Try a different charging cable or USB-C port on the power bank.
- If charging a low-current device, ensure Low Current Mode is activated (refer to Section 5.3).
- Restart the power bank by pressing the power button.
11. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or visit the official Nitecore website. You can also find more information at the Nitecore Store on Amazon.
