Nitecore D4 Charger

The Nitecore D4 is a four-bay intelligent battery charger that automatically identifies battery types and selects the optimal charging mode. It features an integrated LCD screen that displays real-time charging status for each battery individually. The charger is known for its versatility and safety features.

Key features
Display and controls
• Integrated LCD screen: Provides a clear, real-time display of charging progress, voltage, current, and elapsed time.
• Individual slot monitoring: The display can show detailed information for each of the four independent charging slots.
• Nocturnal mode: The LCD backlight can be turned off by holding the “SLOT” button for more than a second, which is useful for overnight charging.

Charging capabilities
• Four independent slots: Monitors and charges up to four batteries of different chemistries and capacities simultaneously.
• Multiple battery chemistry support: Automatically detects and charges Li-ion, Ni-MH, and Ni-Cd batteries. Users can manually select the charging mode for LiFePO4 batteries.
• Low current mode: Allows users to charge smaller-capacity batteries (like AAA or 10440) at a reduced current to extend their lifespan.
• Intelligent charging circuitry: Selects the appropriate charging method for each battery, such as constant current (CC), constant voltage (CV), or negative delta V (-dV/dt).

Safety features
• Automatic shut-off: The charger automatically stops charging when the battery is full to prevent overcharging.
• Reverse polarity protection: An error message is displayed and charging is cut off if a battery is inserted incorrectly.
• Temperature monitoring: Prevents overheating by monitoring the temperature of the batteries.
• Durable, fire-retardant casing: The chassis is constructed from fire-resistant ABS plastic.

Power and construction
• Dual power options: Can be powered via an included AC wall adapter or a DC 12V car adapter.
• Optimal heat dissipation: The body of the charger is designed to prevent overheating.

Specifications
Specification Value Source
Input AC 100-240V 50/60Hz, DC 12V 1A
Output Voltage 4.2V ±1% / 3.7V ±1% / 1.48V ±1%
Output Current 375mA x 4 or 750mA x 2
Dimensions 143mm x 99mm x 36mm (5.63″ x 3.90″ x 1.42″)
Weight 239g (8.43 oz), without batteries and power cord
Compatible Batteries Li-ion / IMR / LiFePO4: 26650, 22650, 18650, 17670, 18490, 17500, 18350, 16340 (RCR123), 14500, 10440. Ni-MH / Ni-Cd: AA, AAA, AAAA, C.

Note: Some larger protected 26650 batteries may not fit, and charging four 18650s simultaneously is slow.