Welcome to the ultimate NOCO Boost XL GB50 user guide. If you own the NOCO GB50 1500A portable jump starter, this page will walk you through everything you need—from how to set it up and use boost mode to solving blinking light issues and maximizing battery health. Let’s jump in.
What is the NOCO Boost XL GB50?
The NOCO Boost GB50 is a compact but powerful 1500-amp lithium-ion jump starter designed for 12V batteries. It can jump start gasoline engines up to 7.0 liters and diesel engines up to 4.5 liters. This makes it a favorite among car owners, truckers, and RV users.
What’s in the Box
- NOCO Boost XL GB50 Jump Starter
- USB charging cable
- 12V car charger
- User manual
- Microfiber storage bag
Technical Specifications
| Internal Battery: | Lithium Ion |
| Peak Current Rating: | 1500A |
| Operating Temperature: | -20°C to +50°C |
| Charging Temperature: | 0ºC to +40ºC |
| Storage Temperature: | -20ºC to +50ºC (Avg Temp.) |
| Micro USB (Input): | 5V, 2.1A |
| USB (Output): | 5V, 2.1A |
| Housing Protection: | IP65 (w/Ports Closed) |
| Cooling: | Natural Convection |
| Dimensions (L x W x H): | 7.6 x 3.2 x 1.9 Inches |
| Weight: | 3 Pounds |
How to Charge the NOCO GB50
- Use the included USB cable and plug it into a USB wall adapter (2.1A recommended).
- Charging time may take up to 5 hours from 0% to 100%.
- LED indicators will blink during charging and turn solid when fully charged.
Tip: Avoid using cheap 1A adapters; they slow down the process significantly.
How to Use the NOCO Boost XL GB50 to Jump Start a Car
- Ensure GB50 is at least 25% charged (preferably 100%).
- Turn off your vehicle and connect the clamps:
- Red clamp to the positive terminal.
- Black clamp to the negative terminal.
- Press the Power button on the GB50.
- Wait for the white LED to illuminate.
- Start your vehicle. Once it starts, disconnect the clamps in reverse order.
What Do the GB50 LED Lights Mean?
- White LED (solid): Ready to boost.
- White LED (blinking): Low voltage detected, may need Force Mode.
- Red Error LED: Reverse polarity or connection error.
- Blue LED: Charging input detected.
How to Enter Force Mode
If your car battery is below 2V, the GB50 might not detect it. Here’s how to activate Force Mode:
- With clamps connected, press and hold the Boost (Lightning Bolt) button for 3 seconds.
- The white LED will flash indicating Force Mode is active.
- Start the vehicle and disconnect as usual.
Common NOCO GB50 Troubleshooting Tips
| Issue | Solution |
|---|---|
| GB50 won’t charge | Check cable & adapter, use 2.1A USB charger, try another cable |
| Flashing red light | Incorrect clamp placement — double check polarity make sure red = positive and black = negative |
| Vehicle won’t start | Ensure clamps are clean/tight, charge GB50, or use Force Mode |
| Boost mode not working | Battery voltage might be too low — activate Force Mode manually |
| Won’t Jump Start Vehicle |
|
Safety Warnings & Maintenance
- Never connect both clamps to the same terminal.
- Keep GB50 stored in dry, cool place when not in use.
- Do not open the casing or attempt internal repairs.
- Recharge the device every 3 months if not used.
Related Guides
Download NOCO Boost XL GB50 User Guide
| Brand | Noco |
| Model | Boost XL GB50 |
| Category |
Battery Charger |
| File Size | 155 Kb |
| Pages | 9 Pages |
| Language | English |
| 1498 views | |
Final Thoughts
The NOCO Boost GB50 is more than just a jump starter—it’s a powerful emergency tool. This guide should help you operate it safely and confidently. Bookmark this page for future reference.
Need more NOCO guides? Check out our full collection of NOCO Manuals.