Submersible, Super Lightweight 20,000mAh Power Bank

Submersible, Super Lightweight 20,000mAh Power Bank

Submersible, Super Lightweight 20,000mAh Power Bank is a perfect bikepacking top tube bag companion. The Carbo 20 20,000mAh power bank is Nitecore's newest offering, eclipsing all prior 20,000mAh power banks with its 65W output and IPX 8 submersible / waterproof performance.

Power your gear anywhere with the Nitecore Carbo 20 — a high-performance 20,000 mAh power bank built for both daily carry and demanding outdoor adventures. With up to 65W fast charging, it easily powers laptops, smartphones, and other USB-C devices at full speed, so you’re never slowed down when it matters most.

Pass Through Charging. Dual USB-C ports let you charge two devices at once, and with pass-through charging, you can recharge the power bank while powering your gear — no downtime, no waiting. The built-in display screen gives you a clear, real-time view of battery percentage and charging status, so you always know exactly how much power you have left.

Built for the Outdoors. Designed for the outdoors, the Carbo 20 features IPX8 waterproof protection to handle rain, splashes, and even submersion, making it a reliable companion in tough environments. Despite its rugged durability, it remains impressively lightweight at just 11.29 oz thanks to its carbon fiber construction, so it won’t weigh you down on the move. Engineered for consistent performance, it delivers stable, high-speed charging without overheating or slowing down, ensuring your devices charge efficiently from start to finish. From travel to trekking, work to exploration, the Nitecore Carbo 20 delivers fast, dependable power wherever you go.

This powerbank is perfect for long rides and extended trips where access to charging points is limited. With a massive capacity of 20000mAh, it provides enough power to charge multiple devices, including smartphones, tablets, GPS devices, and cameras, making it indispensable for any bikepacking trip. Its passthrough charging capability allows you to charge your devices while simultaneously charging the powerbank itself, ensuring that you stay powered up at all times.

Sorry, No Sales Of This Product Outside of Continental U.S. 

The Nitecore NB20000 Gen3 is constructed with a carbon fiber reinforced polymer (CFRP) chassis, making it 40% lighter than conventional power banks. Slightly thicker than a phone, it has a sleek modern minimalist design and fist nicely in virtually all top tube bags and has tons of bikepacking-useful features.

The 20k has two input / output ports, both USB-C; it ships with a short USB-C to USB-C Charging cable. Both input / output ports offer QC output, allowing you to fast charge two devices at once with maximum compatibility with all your electronic gears. The device has auto detect for devices that need low-current charging, so no buttons to press if you need to charge delicate devices such as bluetooth headphones and hearing aids.

The carbon fiber reinforced polymer case makes the case on these highly resistant to puncture, abrasion, and impact. Additionally, it's IPX8 rated waterproof, so it will make it through that afternoon thunderstorm, or even an all day rainfest, and still be ready to charge your devices when you've finally set up that tent and are wringing out your gear. Designed with safeguards against short-circuit, overcharge, over discharge, or overheating.

Product Specifications

• Capacity:  20,000 mAh 15.52V (77.6Wh)
• Rated Energy:  13,500mAh 5V (TYP 3A)
• Dimensions:  L-5.04" x W-1.89" x H-1.14"
• Weight:  11.29oz / 320g
• Input 1: USB-C (IN): 5V⎓3A / 9V⎓3A / 12V⎓3A / 15V⎓3A / 20V⎓3.25A (65W MAX)
• Output 1 / 2:  USB-C (OUT1) / (OUT2): 5V⎓3A / 9V⎓3A / 12V⎓3A / 15V⎓3A / 20V⎓3.25A (65W MAX)
  

Check out our Bikepacking Power Bank Battery Comparison Table

Other facts about this power bank:

• This is our highest power density power bank - it offers tremendous power capacity and value per unit weight - the comparison table above provides a comparison vs other batteries we offer on the site.

• Ships with a Nitecore USB C to USB C Cable

• Can charge two devices simultaneously. Automatically senses the need for low current charging and won't overpower low current devices.

• Supports fast charging if you use a high current charging block (not included).

• Rated at IPX8. This means that the device is highly waterproof and can survive being continuously submerged in water beyond 1 meter (typically up to 1.5 meters or more) for extended periods without leaking.

• Offers a maximum theoretical storage of 20,000mAh but the practical usable storage is approximately 13,500mAh at 5VDC. To put these amounts of storage into context:

  • iPhone 15 / 16 / 17: 3,349mAh / 3,561mAh / 3,692mAh

  • Wahoo Roam storage:  2,000mAh

  • Garmin 530 extra battery pack: 3,100mAh

Full features and benefits video: