Nitecore Ci4 Fast Charger

The Nitecore CI4 charger’s safety features include reverse polarity protection, short-circuit protection, overcharge and overtime charging protection, over-discharged battery activation, intelligent temperature monitoring, and automatic charging termination to prevent damage and hazards. It also uses a durable, fire-retardant casing and a cooling fins design for optimal heat dissipation.

Key features
Charging technology:
Independent slots: The Ci4 can charge four batteries at the same time, with each bay operating independently to detect the battery type and capacity.
Intelligent charging: It automatically selects the optimal charging current and mode (CC, CV, and -dV/dt) for each battery.
Over-discharged battery activation: The charger can safely revive over-discharged Li-ion batteries that have a protective circuit.
Optimized for IMR batteries: It features a charging program specifically designed to ensure safety and prolong the lifespan of IMR batteries.

Charging modes:
Fast Charge Mode: When using a QC/PD adapter, the charger can achieve the following maximum charging currents:
1 battery: 3000mA
2 batteries: 1500mA each
3 batteries: 1000mA each
4 batteries: 750mA each
Standard Mode: When using a standard 5V-2A input, the maximum charging currents are:
1 battery: 2000mA
2 batteries: 1000mA each
3 batteries: 700mA each
4 batteries: 500mA each

Safety features:
Optimal heat dissipation: The charger’s design includes cooling fins to rapidly dissipate heat.
Fire-retardant materials: It is constructed from durable, fire-retardant PC materials.
Built-in safeguards: Protects against reverse polarity, short-circuiting, and over-charging.
Design and compatibility:
Input: USB-C port, compatible with QC/PD adapters, power banks, and solar panels for portable use.
Battery compatibility: Charges a wide variety of Li-ion, IMR, Ni-MH, and Ni-Cd batteries, including:
Li-ion: 10440, 14500, 16340 (RCR123), 18650, 21700, 26650, and many others.
Ni-MH/Ni-Cd: AA, AAA, AAAA, C, D.
Compact size: Weighing just 191.4g, its lightweight and portable design makes it convenient for travel.

Protective Features
Reverse Polarity Protection:
The charger prevents damage if a battery is inserted with the positive and negative terminals reversed.
Short-Circuit Protection:
It protects the charger and batteries from damage caused by short circuits.
Overcharge Protection:
The CI4 automatically stops charging once a battery is full, preventing overcharging.
Overtime Charging Protection:
The charger will terminate the charging process after a set period to avoid potential issues.
Over-Discharged Battery Activation:
It can activate Li-ion batteries that have been discharged to a very low voltage.
Intelligent Temperature Monitoring:
The device includes features to monitor and control temperature, dissipating heat to prevent overheating.

Construction and Design
Fire Retardant Materials:
The charger is built with durable, fire-retardant materials for increased safety.
Cooling Fins Design:
A unique design with cooling fins allows for efficient heat dissipation to prevent overheating during charging.
Battery Inspection:
The CI4 can detect inserted batteries that are short-circuited or have reversed polarity, alerting the user with flashing indicator lights.