NITECORE 21700 Intelligent Battery System

21700 i Series Battery

As a patented product developed by NITECORE, the 21700 i Series Battery is a proprietary 21700 rechargeable Li-ion battery. It features dual-way output with positive and negative polarities at both ends and a high energy density, including models like NL2140i and NL2150HPi. Its groundbreaking technology minimizes power loss due to internal resistance, enabling highly efficient output. When combined with other accessories in the 21700 Intelligent Battery System, it provides a unique user experience in outdoor environments.

ML21 Magnetic Light

Technical Data

Note: The stated data is measured using a 1x5,000mAh 21700 i Series Li-ion battery under laboratory conditions. Data may vary in real-world use due to different battery usage or environmental conditions.

Specifications

Operating Instructions

As shown in Diagram (1), attach the ML21 to the end marked with (+) of the i Series Battery to activate the light. Detach to deactivate it.

Diagram (1) illustrates attaching the ML21 Magnetic Light to the positive (+) terminal of the NITECORE 21700 i Series Battery to activate the light.

Warnings

• CAUTION! Possible dangerous radiation! Do not look into the light! May be dangerous for your eyes.
• The product is only functional when combined with a NITECORE 21700 i Series Battery.
• The product contains strong magnetic components. DO NOT put it close to objects that tend to suffer from magnetic interference.
• The product will not work if attached to the end marked with (-) of the battery.
• Please keep the connectors clean to avoid malfunctions due to an unstable contact.

MPB21 Magnetic Power Bank

Technical Data

Specifications

Operating Instructions

As shown in Diagram (2), attach the MPB21 to the end marked with (+) of the i Series Battery. The blue indicator will be steadily turned on. (Please recharge the battery first if the blue indicator flashes, indicating low power.)

Diagram (2) illustrates attaching the MPB21 Magnetic Power Bank to the positive (+) terminal of the NITECORE 21700 i Series Battery, which will turn on the blue indicator light.

Battery Charging:

After attaching the product to the battery, use the USB cable to connect an external power supply (e.g., a USB charging device) to the input port to begin the charging process.

• During the charging process, the red indicator will flash.
• When the battery is fully charged, the red indicator will be steadily turned on.
• The maximum charging current is 2A.
• The MPB21 supports simultaneous battery charging and USB output. It will automatically adjust the charging current when the external power is insufficient.

USB Output:

When the MPB21 is disconnected from an external power supply, it can be used as a power bank combined with a 21700 i Series Battery to charge an external USB device. After attaching the product to the battery, use the USB cable to connect an external USB device to the output port to begin the charging process.

• During the charging process, the blue indicator will be steadily turned on to indicate sufficient battery power. It will start to flash when the battery power is low. The MPB21 will automatically cease the output process to protect the battery when the battery voltage is below 3V.

Warnings

• Please ensure that the product is attached to the battery first before connecting to an external device. Otherwise, the indicators will not function correctly.
• The product is only functional when combined with a NITECORE 21700 i Series Battery.
• When the MPB21 is attached to the battery without connecting to an external power source or a USB device, the blue indicator will be turned off automatically in approximately 40 seconds to access Hibernation Mode. Connecting to an external power source or a USB device will exit Hibernation Mode.
• The product contains strong magnetic components. DO NOT put it close to objects that tend to suffer from magnetic interference.
• The product will not work if attached to the end marked with (-) of the battery.
• Please keep the connectors clean to avoid malfunctions due to an unstable contact.
• DO NOT store or use the product in an environment where the temperature is extremely high/low or changes rapidly, or in a confined area with a high temperature.

Warranty Information

NITECORE products come with after-sales warranty service. Within 15 days of purchase, any quality issues can be exchanged for free with the dealer. Within 12 months of purchase, enjoy free warranty service. After the 12-month free warranty period, the product has a lifetime limited warranty service, which may incur costs for essential parts replacement.

This warranty does not apply to:

• Man-made damage, disassembly, or modification of the product.
• Product damage caused by incorrect operation.

For any questions about NITECORE products, please contact your local dealer or send an email to service@nitecore.com.

All images, text, and statements in this user manual are for reference purposes only. For the latest information, please refer to the official website www.nitecore.com. SYSMAX Innovations Co., Ltd. reserves the rights to interpret and amend the content of this document at any time without prior notice.

Company Information

SYSMAX Innovations Co., Ltd.

TEL: +86-20-83862000

FAX: +86-20-83882723

E-mail: info@nitecore.com

Web: www.nitecore.com

Address: Rm 2601-06, Central Tower, No.5 Xiancun Road, Tianhe District, Guangzhou, 510623, Guangdong, China

Made in China

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