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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4.9 ★★★★★
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Peter
Belleville, US
★★★★★ 5
CODE is the book you should get.
Format: Paperback
The best book to enter the field. Grateful that Charles Petzold decided to write it, even happier this was one of the first books I picked up. Recommend to everyone wanting to become a programmer, or just interested in computers.
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Reviewed in the United States on January 12, 2026
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Michael Donoghue
Los Angeles, US
★★★★★ 5
If you only buy one technical computer book, this is it
Format: Paperback
Disclaimer: I owned the first edition for years and read it a dozen times, mainly for pleasure since it’s not only informative but also just enjoyable to read. I’m a professional software architect and have dozens of textbooks on computer science and engineering so I’ve been around the block. This is the kind of book I would buy all for all my friends (if I had more than a couple) and family members (if they were even slightly into computers, which they aren’t sadly). Petzold does an exceptional job at describing digital logic and guides you through building a conceptual CPU from very first principles. I think his bottom up approach is the way to go and has helped me understand complex topics in an extremely simple way. When I’m not reading fiction, this is my go to bedtime reading. The second edition has about 100 more pages than the first and some content has been completely reworked and it’s great. If you ever had even a passing interest in knowing how computers work at a very fundamental level, get this book!
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Reviewed in the United States on January 31, 2023
Y
Verified Purchase
Yura
Draper, US
★★★★★ 4
First programmer?
Format: Paperback
As an ardent reader of the past 1st edition, I was fairly excited to get the latest version. That is, until I encountered the history chapter of the new edition. For one thing, what I do NOT understand in this second edition is the newly added description of August Ada Byron (countless of Lovelace). The author claims it was Babbage who was the first programmer to design the engines, not Ada. I am not trying to start a futile argument here about who has more or fewer contributions, etc. What I am trying to assert here is that it is undisputed that Ada (unless the new evidence arises) left *the very first demonstration* of what this seemingly imaginary machine, which didn't even physically exist, was capable of through her program. Because Babbage designed the engine itself, that doesn't automatically put him in the position of a programmer (despite Babbage being a brilliant engineer/scientist and may have had a simple or detailed program in his mind). However, it was Ada who gave a definite touch to programming concepts that ultimately led to modern-day programming. Ada deserves more recognition than a mere "tutorial writer," and she is certainly entitled to the title she deserves. Other than that, like the previous edition, this book is a must-read for people who are from related/unrelated fields. I always loved the 1st edition, and I would do too with the 2nd. Still, I think history should always be approached with more care, particularly if matters have potential controversies.
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Reviewed in the United States on January 6, 2023
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Ben Fleury
Phoenix, US
★★★★★ 5
One of the few books worth your time
Format: Paperback
If you want to learn computers, start here. Learning from a historical perspective removes complexity of trying to start with say GPUs - you learn just like computer engineers did, incrementally.
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Reviewed in the United States on April 27, 2026
K
Verified Purchase
Kevin
Chelsea, US
★★★★★ 5
An absolutely brilliant book
Format: Paperback
This is an amazing book for the right kind of reader. It's a lot like Euclid's Elements but for computers as it leads the reader through designing a computer from first principles and builds to the point of creating software and adding peripherals. It's an amazingly clear but slightly challenging read. I have given this book as a gift many many times. It's an absolute classic in my opinion.
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Reviewed in the United States on March 19, 2025

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