Product Description
The NITECORE Ci2 is a highly intelligent and powerful 2-slot battery charger designed for versatile and efficient battery management. Featuring a modern USB-C input that supports QC and PD fast charging protocols (up to 18W), it delivers an impressive 3000mA maximum output for a single slot in fast charge mode. The Ci2 utilizes an automatic current distribution system to intelligently allocate the optimal charging current across its two slots based on battery capacity and type. It includes a proprietary battery activation function to revive over-discharged Li-ion batteries and an optimized charging program specifically for IMR batteries to enhance lifespan. Constructed with flame-retardant PC materials and equipped with comprehensive safety protections, the NITECORE Ci2 is a reliable, fast, and compact charging solution for your everyday devices and outdoor gear.
Key Features
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3000mA Ultra-Fast Charging & QC/PD Support: In fast charge mode, it provides up to 3000mA for a single slot and 1500mA per slot for two slots. Standard mode offers 2000mA for a single slot and 1000mA per slot for two slots. Features a USB-C port that intelligently recognizes QC and PD chargers (5V/2A, 9V/2A, 12V/1.5A, 18W max).
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Automatic Current Distribution & Smart Charging: Built-in microchip automatically identifies battery capacity and type, then intelligently allocates the ideal charging current. Simply insert the batteries and let the Ci2 handle the rest.
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Optimized Program for IMR Batteries: Features a tailored charging algorithm designed specifically for IMR batteries, with comprehensive monitoring to keep the charging cut-off voltage strictly within the safe 4.2V range, significantly extending battery life.
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Intelligent Battery Activation Function: Automatically detects and safely activates over-discharged Li-ion batteries equipped with protection circuits. If a battery is damaged and cannot be revived, all LED indicators will flash rapidly to notify the user.
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Clear LED Status Indicators: Displays real-time battery charge status via intuitive LED lights. One green light indicates approximately 30% charge; two green lights indicate approximately 60% charge; three green lights indicate fully charged. A red light indicates active fast charging mode.
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Dual External & Internal Safety Protections: Externally built with premium PC flame-retardant material and an efficient heat dissipation fin design. Internally, it features charging timeout protection, anti-reverse polarity and short-circuit protection, and an intelligent temperature control program.
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Automatic Energy-Saving Mode: When the charger is connected to a power source but no batteries are inserted, all indicator lights automatically turn off to reduce power consumption and minimize standby energy loss.
Product Parameters
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Brand: NITECORE
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Model: Ci2
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Input Voltage: DC 5V/2A, 9V/2A, 12V/1.5A (18W Max, USB-C)
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Output Voltage: 4.2V ±1% / 1.48V ±1%
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Output Current (Fast Mode): 3000mA1 (Max), 1500mA2 (Max)
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Output Current (Standard Mode): 2000mA1 (Max), 1000mA2 (Max)
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Dimensions: 148mm x 65mm x 37mm
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Net Weight: 120.4g (excluding cable)
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Supported Battery Types: 3.6V / 3.7V Li-ion (IMR/INR/ICR), 1.2V Ni-MH / Ni-CD
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Supported Li-ion/IMR Sizes: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 21700, 22500, 22650, 25500, 26500, 26650, 26700
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Supported Ni-MH/Ni-CD Sizes: AA, AAA, AAAA, C, D
Applications
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Rapid daily charging and maintenance for high-performance EDC tactical flashlights and searchlights.
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Fast and optimized power replenishment for IMR batteries used in high-wattage electronic cigarettes .
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Portable power station for camping gear via USB-C connection to mobile power or solar panels.
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Convenient and efficient charging hub for AA/AAA Ni-MH batteries used in household electronics.
Frequently Asked Questions (FAQ)
Q1: What is the maximum charging current of the NITECORE Ci2?
A1: In fast charging mode, the Ci2 provides a maximum of 3000mA for a single slot, or 1500mA per slot when charging two batteries simultaneously. In standard mode, it provides 2000mA for a single slot, or 1000mA per slot for two batteries.
Q2: How do I achieve the fastest possible charging speed?
A2: To reach the peak 3000mA output, you must use a QC or PD power adapter (supporting 9V/2A or 12V/1.5A input) and charge a single lithium-ion battery in only one slot.
Q3: Does the Ci2 support 21700 batteries or LiFePO4 batteries?
A3: Yes, it fully supports 21700 batteries (as well as larger sizes like 26650). However, it does NOT support 3.2V LiFePO4 batteries, as it utilizes a fixed 4.2V cut-off voltage designed specifically for 3.6V/3.7V Li-ion cells.
Q4: What do the LED indicator lights mean?
A4: 1 green light indicates roughly 30% charge; 2 green lights indicate roughly 60% charge; 3 green lights mean fully charged. A red light indicates active fast charging. If all LEDs flash rapidly, it indicates a battery activation failure or a damaged battery.
Q5: Can I charge Li-ion and Ni-MH batteries at the same time?
A5: Yes. The Ci2 features two independent charging slots with automatic current distribution. You can safely charge a Li-ion battery in one slot and a Ni-MH battery in the other slot simultaneously.
