More than a battery, are you looking for an intelligent system?

It's not just a battery, but an intelligent system that allows you to expand its capacity.

Nitecore's patented 21700i enables highly efficient output while minimizing power loss.
It features bidirectional output on both ends and is compatible with intelligent control modules!

The 21700i battery has an energy density of a whopping 240 mWh/g!

The dual polarity broke the convention of connecting head and tail while minimizing size and weight.
The internal resistance is therefore significantly reduced and allows for direct conversion of energy to power devices.

ML21

The ML21 magnetic flashlight add-on offers a maximum output of 80 lumens making it perfect for short-distance illumination as well as reading, camping or emergencies.

HIGH COLOR RENDERING

The ML21 features high color rendering, allowing it to emit a warm, soft beam of light reminiscent of sunlight.
This ensures clear vision while reducing eye strain!

MPB21

The MPB21 allows you to transform the battery into an emergency power bank to charge your devices when needed.

MC21 OPTIONAL

2 IN 1

This system therefore allows you to use the 21700i as a charger but also as a power bank!
You just need to use the two dedicated addons!

COMPATIBLE WITH NITECORE CHARGERS

In addition to being charged inside the flashlight, this battery can be charged with Nitecore Smart Chargers!

MULTIPLE SECURITY SYSTEMS

The 21700i has all of Nitecore's latest protection systems such as overload protection, overvoltage protection and reverse polarity protection.

SPECIFICATIONS