Nitecore · United States · outdoor
Exact model: NB20000 · Revision: Gen 3
Product identity · checked 2026-10-07
Manufacturer product image · source
Nitecore specifies 72Wh at 291g, with two USB-C outputs rated up to 22.5W each when used individually. The 15W combined ceiling is a separate limit for multi-port use.
View manufacturer product pageAvailability checked 2026-10-07. Stock can change.
Manufacturer product image · source
BatteryRank review
A 20,000mAh outdoor option for carrying more stated energy than a 10,000mAh bank while keeping the listed body weight at 291g.
Ratings below are manufacturer-claimed. Open a reading to see its source and check date; derived comparisons are identified separately.
Use and carrying fit
Nitecore lists trekking, cycling, and climbing as use cases and rates the pack at 72Wh and 291g. Its strongest single USB-C output is 22.5W, so check the connected device’s accepted charging profile before expecting that ceiling.
What changes the choice
The 20,000mAh (72Wh) label describes rated battery energy, while 22.5W is the single-port USB-C ceiling. Nitecore lists combined output at 15W when ports are shared.
Nitecore specifies 291g ±5g with accessories excluded and lists a USB-C-to-USB-A adapter in the package. A trail kit that carries the adapter or extra leads weighs more than the bank-only rating.
Before connecting devices
A port’s published maximum and the combined multi-port limit are separate ratings. A device can draw less than the bank’s maximum based on its own requirements and the negotiated charging profile.
Nitecore lists either USB-C input at 18W maximum and either USB-C output at 22.5W maximum. Its page gives the input and output profiles separately; compatible source, cable, and device determine the negotiated rate.
Manufacturer documentation
Manufacturer claims link to the dated source used for this exact revision. Watt-hours appear only when the OEM states them explicitly; we do not infer energy from milliamp-hours.
Exact-model questions
Nitecore lists 22.5W maximum for each USB-C output and a separate 15W maximum total output. Use the 22.5W figure for one port; multiple connected devices share the lower combined ceiling.
Nitecore explicitly rates its 20,000mAh cell at 3.6V, or 72Wh. Its separate rated output energy is 10,100mAh at 5V; that delivered-energy figure is not interchangeable with the cell rating.
Evidence record
We use manufacturer documentation for the product identity and claims shown on this review.
Checked 2026-10-07
Review updated 2026-10-07. Ratings are manufacturer claims tied to the cited documents.