HKM-902675 Nitecore D4 Lithium-ion Battery Charger for 18650, 14500, 16340, 26650 with LCD Display and Intelligent Circuitry
SKU: 20019937215

HKM-902675 Nitecore D4 Lithium-ion Battery Charger for 18650, 14500, 16340, 26650 with LCD Display and Intelligent Circuitry

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Description

HKM-902675 Nitecore D4 Lithium-ion Battery Charger for 18650, 14500, 16340, 26650 with LCD Display and Intelligent CircuitryIntroducing the HKM 902675 Nitecore D4 Lithium ion Battery Charger, a reliable and efficient solution for charging various lithium ion batteries, including 18650, 14500, 16340, and 26650 models. This charger is designed for performance, boasting an intelligent circuitry that ensures safe and effective charging, making it an essential tool for enthusiasts and professionals alike. The Nitecore D4 features a clear LCD display that provides real time

Introducing the HKM-902675 Nitecore D4 Lithium-ion Battery Charger, a reliable and efficient solution for charging various lithium-ion batteries, including 18650, 14500, 16340, and 26650 models. This charger is designed for performance, boasting an intelligent circuitry that ensures safe and effective charging, making it an essential tool for enthusiasts and professionals alike.

The Nitecore D4 features a clear LCD display that provides real-time information on the charging process. You will find it easy to monitor each battery's status, thanks to its intuitive LED indicators. When powered on, the green LED shows it is ready for use. Upon inserting a battery, the LED transitions to orange, indicating that the charging process is underway. Once a battery is fully charged, the LED will change back to green, providing a straightforward way to know when your batteries are ready for use.

This charger supports a variety of output currents, including 375mA for four batteries or 750mA for two, which optimizes the charging times based on your needs. It operates with remarkable precision, ensuring that each battery is charged with a constant current and constant voltage, essential for maintaining battery health and longevity.

The compact size of the D4 (143mm x 99mm x 36mm) makes it convenient for storage and transport, allowing you to take it anywhere you need reliable charging. With its advanced safety features, including short circuit protection and temperature monitoring, you can trust that your batteries are in good hands.

Whether you are a hobbyist looking to keep your devices powered or a professional in need of a dependable charger, the HKM-902675 Nitecore D4 Lithium-ion Battery Charger is your go-to choice for efficient and safe battery charging.

Model: D4
Input voltage: DC 12V 1.0A
Output voltage: 4.2V ± 1% / 3.7V ± 1% / 1.48v ± 1%
Output current: 375ma * 4 / 750ma * 2
Size: 143mm * 99mm * 36mm
Product features]
Lithium battery charger is specially used for charging lithium-ion battery. Lithium ion battery has high requirements for charger and needs protection circuit, so lithium battery charger usually has high control precision and can charge lithium-ion battery with constant current and constant voltage.
[charging process]
When the power supply is not connected, the LED light on the circuit board is not on
The power supply is connected to the circuit board, and the green LED is on continuously. At this time, the circuit board is waiting for the lithium battery to be placed
After the lithium battery is put in, it starts to charge, and the LED turns orange
When the lithium battery is fully charged, it stops charging and the LED turns orange
After the lithium battery is fully charged, the battery is removed, the LED turns green, and the lithium battery is put in again for charging
During charging, the charging percentage is displayed
LED light:
Keep green: waiting for battery
Continuous yellow: charging
Full or charged for 6 hours
Flashing orange: warning message (output short circuit, reverse of positive and negative poles, abnormal temperature)

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SKU: 20019937215

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Yajahira C
Lowell, US
★★★★★ 5
Very good!
Format: Paperback
Book worth gold I love it! I will read it again! I recommend you buy it! Open your mind and make finances 🧠✨️
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Reviewed in the United States on April 1, 2026
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Cliente de Kindle
Massapequa, US
★★★★★ 4
8.5 de 10
Format: Kindle
Lenguaje solo para profesionales y no para principiantes. Lo demás es perfecto con 4 estrellas ya que hasta lloré 3 veces ...
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Reviewed in the United States on April 22, 2026
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Marilyn solano
Lake Worth, US
★★★★★ 5
Interesting
Format: Paperback
Product with very good quality, its description matches the website.
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Reviewed in the United States on April 11, 2026
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Daniel Rosehill
Houston, US
★★★★★ 5
A wonderful primer for those discovering the amazing world of generative AI
Format: Paperback, Format: Paperback
Somewhere in the past year, ChatGPT has gone from "cool, interesting, amusing" to a massively valuable work assistant capable of writing Python scripts, analysing data, and doing lots, lots, more. The key to this? The rapid evolution of OpenAI's GPT models and making my first forays into prompt engineering. If I thought I was getting good, though, this book took me reminded me that I'm just scratching the surface. Halfway through the first chapter I was already furiously scribbling notes in the margins for what I could do better with my prompt writing and by the end of the text I felt like I had gotten a very good grounding - not just in GPTs specifically but in the bigger picture of how these hugely powerful tools were trained and came to maturity. I imagine that few will argue with my assertion that there is lots of hyperbole and "noise" in the AI space right now which, as ever, makes it hard to pick out the signal from the noise. Which is precisely why I sought out an O'Reilly title and I'm very glad that I did. Thorough, excellent, and I hope that this edition will be the first of many. As this rapidly maturing field scales and matures I think that prompt engineering will be an essential discipline to master. Pick up this text to get a good foothold on things.
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Reviewed in the United States on August 3, 2024
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Scott J. Pearson
Grantham, US
★★★★★ 4
Understanding AI prompts as a science
Format: Audiobook
Prompt engineering is the art and science of finding the right words to generate the right responses from artificial intelligence (AI). It's becoming a skill in-demand in today's workplaces. It's also becoming an essential skill for life. To understand prompt engineering, you must understand how AI tools understand their inputs. This book explains that to you in many forms. It covers prompting as it intersects all the major AI disciplines, like general prompts (as in a ChatBot), fine-tuning, and retrieval-augmented generation (RAG). It also introduces how prompting intersects a couple of image-generation tools. As a scientist, I appreciate the theoretical approach to these practical matters. Too many people are hacks at AI these days, and any technical understanding can rapidly advance an individual's effectiveness. Prompt engineering is often made fun of as a "soft" topic, but as this book demonstrates, it intersects all the major AI areas. Presumably less garbage in means less garbage out. This book shows how you can make that take place. As typical for O'Reilly materials, this book appeals to people who desire an intermediate-to-advanced understanding of how AI works. It's not for the casual user. Anyone technical involved in professional knowledge generation using AI can benefit from understanding the dynamics "under the hood." It's a good, though perhaps not ground-breaking, textbook for those of us unable to take a class in the subject. Prompt engineering may be a soft topic to many, but books like this ground the field in the science that can make or break a digital or software product.
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Reviewed in the United States on December 13, 2025

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