Nitecore D4 and i4 Intelligent Chargers – Spinfuel Review

In the world of vaping, having reliable, high-quality batteries is crucial, and equally important is an intelligent charger to keep them performing optimally and safely. Nitecore has long been a trusted name in the charging device market, and their recent releases, the Nitecore D4 and i4 intelligent chargers, continue this legacy. This review delves into the features, performance, and overall value of both chargers to help you decide which one best suits your vaping needs.

The Nitecore i4 and D4 Chargers: A Brief Overview

Nitecore Intelligent Chargers have established a strong reputation for their exceptional quality and innovative design. Both the i4 and D4 models exemplify Nitecore’s commitment to delivering superior charging solutions for a wide array of battery types, essential for vapers using various mods and devices. These chargers are designed not just for efficiency but also for paramount safety.

While both are four-bay chargers capable of handling popular battery chemistries such as Li-ion (e.g., 18650, 26650, 16340, 14500, 10440) and Ni-MH/Ni-Cd (e.g., AA, AAA, C), they cater to slightly different user preferences through their distinct feature sets:

• Nitecore i4: This model offers a straightforward charging experience, featuring a clear LED indicator system for each bay and robust automatic shut-off and overcharge protection, ensuring safety and ease of use.
• Nitecore D4: Positioned for the more discerning user, the D4 boasts an advanced LCD display that provides real-time, detailed information on battery type, charging status, voltage, current, and time. It supports a broader spectrum of battery chemistries and offers a more sophisticated charging management system.

Whether you prioritize simplicity or detailed control, both chargers are engineered with the highest safety standards, including reverse polarity protection, short circuit prevention, and temperature monitoring.

Nitecore D4 Intelligent Charger Review

Appearance and Construction

The Nitecore D4 is built with a sturdy, high-quality plastic chassis that feels durable and robust. Its compact design makes it suitable for both home use and travel. The charger features a standard AC power input, eliminating the need for external power bricks, which is a convenient touch. The most striking design element is its integrated LCD screen, which immediately conveys its advanced capabilities.

Features

The D4 excels in its feature set, designed for optimal battery health and user control:

• Independent Four-Bay Charging: Each of the four bays operates independently, allowing you to charge different battery types and sizes simultaneously without interference.
• Automatic Battery Detection: The D4 intelligently identifies Li-ion, Ni-MH, and Ni-Cd batteries and applies the appropriate charging mode (Constant Current, Constant Voltage for Li-ion; -dV/dT for Ni-MH/Ni-Cd).
• Comprehensive LCD Display: The integrated LCD panel provides a wealth of real-time information for each battery, including battery type, charging status (e.g., “charging,” “full”), current voltage, charging current, and elapsed charging time.
• User Interface: Two side buttons allow users to cycle through the display information for each bay, offering granular control and monitoring.
• Safety Protections: Built-in safeguards include over-charge protection, over-discharge protection, short-circuit prevention, and reverse polarity protection. It also features temperature monitoring to prevent overheating.
• Optimized Charging: The D4 can charge two batteries at 750mA each, or four batteries at 375mA each, automatically adjusting the current for efficient and safe charging.
• Wide Battery Compatibility: Supports a vast range of cylindrical rechargeable batteries, including 18650, 26650, 14500, 16340 (RCR123), 10440, AA, AAA, and C cells.

Performance

In practice, the Nitecore D4 performs admirably. Charging two 18650 batteries from empty typically takes around 4-5 hours, which is standard for intelligent chargers of this caliber. The real advantage lies in the LCD display; being able to see the real-time voltage and charging current is incredibly useful for understanding your battery’s health and the charging process. The automatic adjustment of charging current when more batteries are added is seamless and ensures consistent safety and efficiency. This charger is particularly recommended for advanced vapers who appreciate detailed data and precise control over their battery maintenance.

Nitecore i4 Intelligent Charger Review

Appearance and Construction

Similar to the D4, the Nitecore i4 is constructed from durable, high-quality plastic, designed to withstand regular use. It also maintains a compact form factor, making it a portable option. The i4 uses a standard AC power cord, which simplifies its setup. Unlike the D4, the i4 opts for a simpler LED indicator system rather than a full LCD, which contributes to its more minimalist aesthetic.

Features

The i4 focuses on providing essential features for reliable and safe charging:

• Independent Four-Bay Charging: Each of the four bays operates independently, allowing for simultaneous charging of different battery types and sizes.
• Automatic Battery Detection: The i4 automatically detects Li-ion, Ni-MH, and Ni-Cd batteries and applies the appropriate charging algorithm.
• Three-Color LED Indicators: Each bay has a dedicated three-color LED that clearly indicates the charging status: red for charging, green for fully charged, and other indicators for errors.
• Safety Protections: Includes comprehensive safety features such as over-charge protection, over-discharge protection, short-circuit prevention, and reverse polarity protection, ensuring safe operation.
• Optimized Charging: Delivers up to 750mA for two batteries or 375mA for four batteries, intelligently adjusting the current based on the number of batteries inserted.
• Wide Battery Compatibility: Compatible with a broad spectrum of cylindrical rechargeable batteries, including 18650, 26650, 14500, 16340 (RCR123), 10440, AA, AAA, and C cells.

Performance

The Nitecore i4 consistently delivers reliable charging performance. While it lacks the detailed real-time data of the D4, its LED indicators are intuitive and sufficient for most users. Charging times are comparable to the D4, with 18650 batteries typically reaching full charge in approximately 4-5 hours. The i4 is an excellent choice for vapers who prioritize simplicity, ease of use, and dependable performance without needing to dive into granular charging data.

Conclusion

Both the Nitecore D4 and i4 intelligent chargers are outstanding products that uphold Nitecore’s reputation for quality and innovation. The choice between them ultimately depends on your individual preferences and technical needs:

• Choose the Nitecore D4 if you are an advanced user who values detailed real-time charging data, prefer an LCD display, and want to monitor every aspect of your battery’s health. Its comprehensive information empowers users with greater control and insight.
• Opt for the Nitecore i4 if you prioritize simplicity, ease of use, and a reliable “set it and forget it” charging solution. Its clear LED indicators make it user-friendly for anyone seeking efficient and safe battery maintenance without the need for intricate data.

Regardless of your choice, both chargers represent an essential investment for any serious vaper, ensuring your batteries are always charged safely and efficiently. We highly recommend both for their performance, safety features, and overall value.

Disclosures

A full review of the Nitecore D4 and i4 Intelligent Chargers. The units were provided by Nitecore for review. Spinfuel is an independent publication and does not accept compensation for reviews. All reviews are conducted by experienced vapers and reflect honest opinions.