NITECORE F21i Fast Charging Power System User Manual

NITECORE F21i Fast Charging Power System User Manual

Features

• Dual Way Fast Charging Power System for 21700 i Series Batteries
• 18W USB-C dual way fast charging available with QC,n PD and more protocols
• Automatic detection on the USB devices to be used as a power bank
• Power indicators can indicate the remaining battery power
• Mechanical polarity reverse protection
• Multiple protection safeguards including overcharge, over-discharge, overcurrent protections and more
• Body made from lightweight and fire retardant PC materials
• Elastic band made from durable, corrosion and heat resistant EPDM rubber

Technical Data

Input: USB-C: 5V⎓2A / 9V⎓2A
Output: Battery: 4.2V⎓4A (MAX)
USB-C: 5V⎓2.4A / 9V⎓2A / 12V⎓1.5A

Specifications

Diameter: 27.4mm (1.08″)
Length: 112.5mm (4.43″) (With Battery) Weight: 22g (0.78oz)

Accessories

USB Charging Cable
(USB-C to USB-C)

Battery Installation

Operating Instructions Battery Installation

Insert the 21700 i Series Battery with the end marked with (+) towards the body of the F21i and fasten it with the
elastic band as illustrated. The 3 blue indicators beside the USB-C port will turn on successively and then turn off.

Power Level Display

When the battery is inserted, tap the USB-C port and the blue indicators will turn on to display the power level:

(The F21i will automatically access Hibernation Mode
when there is no input or output in approx. 30 seconds.)

Battery Charging

When the battery is inserted, use the USB charging cable to connect an external power source to the F21i to begin the charging process. During the charging process, the blue indicators will flash to display the power level. When the battery is fully charged, all 3 blue indicators will turn on constantly.

USB Output

When the battery is inserted, use the USB charging cable to connect a USB device to the F21i to begin the output process. During the output process, the blue indicators will turn on constantly to display the power level. The last blue indicator will start to flash when the power level is low. The F21i will automatically cease the output process to protect the battery with the blue indicators turned off when the power is nearly depleted.

Fast Charging Mode

During the battery charging or the USB output process, the white indicator will turn on to indicate the access of Fast Charging Mode if the external device is available
with fast charging protocols. (It is normal that this process may have a delay of approx. 30 seconds.)

Warnings

1. The product is only functional when combined with a NITECORE 21700 i Series Battery.
2. The product will not work if attached to the end marked with (-) of the battery.
3. When the battery is inserted without connecting to an external power source or a USB device, the blue indicators will turn off automatically in approx. 30 seconds to access Hibernation Mode. Connecting to an external power source or a USB device will exit Hibernation Mode.
4. Please read the user manual carefully before using the product and connect the applicable external devices only according to the specifications in this user manual.
5. Ambient Temperature of Usage: -10~40℃ (14~104℉); Temperature of Storage: -20~60℃ (-4~140℉)
6.  Moderate heat from this product is to be expected when in use. The product has thermal protection function to automatically lower the charging current to protect the battery when the temperature is too high.
7. DO NOT leave the product unattended when it is working. Stop using the product at any sign of malfunction.
8. DO NOT use charging cables made or sold by unprofessional manufacturers or ones that are damaged.
9. Unplug the device and remove the battery when it is not in use.
10. Store the device in ventilated areas. DO NOT expose the device in rain or moist environment. Keep it away from any combustible material.
11. 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.
12. Avoid any shock or impact to the device.
13. DO NOT place any conductive or metal object in the device to avoid short circuiting and explosions.

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

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