The Nitecore New i4 is a universal four-slot charger designed for users who demand intelligent battery management, broad compatibility, and reliable performance in a compact and efficient device. As an upgraded version of the original i4, the New i4 offers enhanced charging speed, smarter circuitry, and improved compatibility with a wider variety of battery chemistries. Capable of charging up to four batteries simultaneously, each slot is independently controlled by a sophisticated microprocessor that automatically identifies the battery type and selects the appropriate charging method. Whether dealing with Li-ion, IMR, LiFePO4, Ni-MH, or Ni-Cd cells, the New i4 dynamically applies the most suitable charging algorithm, including Constant Current (CC), Constant Voltage (CV), or Trickle Charge, to ensure optimal and safe performance.

One of the defining features of the Nitecore New i4 is its universal compatibility. It supports an extensive range of lithium-ion cell sizes from compact formats like 10340, 10440, and 14500, all the way to high-capacity batteries such as 18650, 20700, 26650, and more. It also accommodates nickel-metal hydride and nickel-cadmium batteries including the commonly used AA, AAA, AAAA, C, and D cells. This wide-ranging compatibility makes the charger suitable for users with mixed battery inventories, such as flashlight enthusiasts, photographers, vapers, or professionals using various portable electronics. The New i4 simplifies battery charging by allowing different types and sizes to be charged simultaneously in any of the four slots without manual mode switching.

The charger’s intelligent circuitry also adjusts the output current based on the number of batteries being charged and their individual conditions. It offers various current outputs, such as 1.5A for a single battery, 0.75A when two batteries are inserted, 0.5A with three, and 0.375A across all four slots. This efficient distribution not only optimizes the charging time but also minimizes stress on the batteries, thus extending their lifespan. Safety remains a top priority in the Nitecore New i4’s design, with built-in reverse polarity protection to prevent damage if a battery is inserted incorrectly. Additionally, the charger automatically terminates the charging process once each battery is fully charged, preventing overcharging and overheating.

A clear and intuitive visual interface further enhances the user experience. Each slot is equipped with a three-color LED indicator that communicates charging progress. These lights shift from red to green as the charging process advances, giving a quick and easy reference at a glance. The LEDs also alert the user if an abnormal battery is detected, providing essential feedback and maintaining operational safety. Unlike many entry-level chargers, the New i4 includes automatic heat dissipation features. Its carefully designed casing allows for passive airflow and thermal regulation, which maintains safe internal temperatures even during extended or high-current charging sessions.

The charger’s input options include an AC voltage range of 100–250V, supporting worldwide operation, as well as a DC input of 9–12V at 1A, making it suitable for use with car adapters or other DC power sources. This dual-input capability makes the New i4 highly versatile and ideal for both stationary and mobile charging setups. It also carries both RoHS and CE certifications, confirming compliance with international safety and environmental standards.

With physical dimensions of 5.50 inches in length, 3.70 inches in width, and 1.50 inches in height, the Nitecore New i4 is compact enough to fit comfortably in a drawer, gear bag, or toolkit. It weighs only 7 ounces without batteries or power cords, further enhancing its portability. Despite its small size, the unit delivers robust functionality and intelligent power distribution that rivals many larger, more complex chargers. Its lightweight build and durable design ensure that it can withstand regular transport and usage in diverse environments.

Ultimately, the Nitecore New i4 is more than just a basic charger; it is a complete battery management system tailored to modern users who value safety, adaptability, and simplicity. Whether at home, in the workshop, or out in the field, the New i4 offers dependable charging for nearly every cylindrical rechargeable battery format in use today. Its ability to automatically detect battery chemistries, manage current output intelligently, and display real-time charging progress makes it an essential tool for anyone who relies on rechargeable power. From casual users to technical professionals, the New i4 delivers reliability and peace of mind in a sleek, user-friendly package.

Features

• Capable of charging 4 batteries simultaneously
• >Automatically identify Li-ion, Ni-MH and Ni-Cd rechargeable batteries and apply an appropriate charging mode (Constant Charge Current (CC), Constant Charge Voltage (CV) and Trickle Charge).
• Compatible Battery Type: 
  • Li-ion/IMR/LiFePO4: 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14350, 14430, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500,18650, 18700, 20700, 22500, 22650, 25500, 26500, 26650
  • Ni-MH(NiCd): AA, AAA, AAAA, C, D
• 3 Color LED displays charging progress for each battery
• Automatically stops charging when complete
• Reverse polarity protection<
• Designed for optimal heat dissipation
• Certified by both RoHS and CE

Input Voltage: AC 100~250V 50/60Hz 0.25A(Max) 10W DC 9~12V 1A
Output Voltage: 4.35V ±1% / 4.2V ±1% / 3.7V ±1% / 1.48V ±1%
Output Current: 1.5A x 1 / 0.75A x 2 / 0.5A x 2 / 0.375A x 4
Compatible with-Li-ion/IMR/LiFePO4:
10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14350, 14430, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500,18650, 22500, 22650, 25500, 26500, 26650 Ni-MH(NiCd): AA, AAA, AAAA, C, D
Dimensions: L-5.50" x W-3.70" x H-1.50"
Weight: 7 oz (without batteries and power cord)

SHIPPING
The final shipping cost and estimated delivery timeframe will be available to you during checkout. Currently, we offer 3 International shipping methods which are steady and easy to track. Priority worldwide shipping, Premium ( Partial countries) and a faster Express shipping. The estimated times stated below are not guaranteed. An international package could experience delays like postal strikes or severe weather or Cov-19 situation. All shipping ways, PO Box address is not acceptable.

For some flashlights, there's a pure battery inside（phone charging）,If We can not ship your packages via USPS or DHL,we'll ship your package in another way.

Note:
When you place an order for just the batteries, for easy shipping, faster and safe delivery, the batteries are placed in the flashlights.

If you don’t receive your order within the estimated time frame provided below and suspect that it might be lost in transit, please contact Flashlightgo Support ( support@flashlightgo.com ) and we can look into the order with the courier. Lost-in-transit requests must be submitted to Flashlightgo Support within 3 months of the date of shipping or before the courier archives the tracking information.

Option 1.
Express by DHL/UPS/Fedex/Aramax/SF etc ( there may be tax need to pay in this way),
The estimated time of delivery is usually 3-7 work days depending on the country. Includes detailed tracking and confirmation of delivery.

Option 2.
Premium ( 6-10days, All tax and Duty Paid),
All tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

Option 3.
Priority shipping(1-2 Weeks, average 10 days)
If we marked it is with all tax and duty paid, all tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

Learn more,Please click on Here.

To ensure that you get the desirable product, we allow a seven-day product return period. Any product return application outside this period will not be entertained.
All returned product must be unused and the original package should be kept.

Return：
We do not offer return for personal products like socks and hats or food, magazine and fragile or dangerous products The original receipt must be available for application of return.

Discount products：
No product return for discount products

Gifts products：
If the item is marked as a gift when purchased and shipped directly to you, it cannot be exchanged , refunded or warranty.

Exchange：
We only replace items if they are defective or damaged.
Exchange service are offered only to wrong deliveries or product damage not caused by client. If needed, please email to info@flashlightgo.com.

Warranty
How long is the warranty period?
Flashlightgo warrants to the original purchaser that the Product(s) shall be free of any defect in material or workmanship for a period of one year for labor and one year for parts from the date of the original order except the items listed below:
Chargers,Batteries and Other Accessories: 3 months warranty

Should the Product(s) supplied by Flashlightgo prove defective because of improper workmanship or material as reasonably determined by us, Flashlightgo agrees, at its option, to either repair or replace the Product free of charge, excluding any shipping or handling charges.

Learn more,Please click here.