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Posts by Alex

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About Alex

Alex Gradea, a 34-year-old from Galati, Romania, is a remarkable blend of a DIY enthusiast, programmer, hardware engineer, and web developer. He's the innovative mind behind the MegaCell Charger, a groundbreaking device in the battery testing and refurbishing world. This tool stands out for its ability to individually test and charge multiple lithium-ion cells, making it an essential asset for DIY battery builders and recyclers. Alex's journey in the tech world is marked by a passion for both software and hardware, seamlessly integrating his programming skills with hardware engineering prowess. His expertise in web development complements his technical skills, allowing him to create sophisticated systems that are both functional and user-friendly. In his courses, Alex shares his extensive knowledge in building and testing batteries, drawing from his rich experience in developing the MegaCell Charger. His lessons are more than just instructional; they are a glimpse into the mind of an innovator who is reshaping the way we think about power and energy storage. Whether you're a budding hobbyist or an experienced maker, Alex's unique blend of skills and his hands-on approach to teaching make his courses a must-attend for anyone interested in DIY battery projects, programming, and hardware development.

Reviving a Junior Dirt Bike: 48V 13S 6P Battery Rebuild and Water Damage Repair

Battery Build

In this detailed tutorial, we demonstrate the process of rebuilding a 13S 6P lithium battery pack for a junior dirt bike that sustained water damage. Here’s what you can expect from the video:

 

  • Battery Rebuild: Watch as we replace all the damaged cells with ones salvaged from other battery packs.
  • Time Efficient: The entire rebuild process took approximately three hours.
  • Cell Salvaging: Out of 65 original cells, we managed to salvage 64 and used them to construct a new pack by combining them with additional used cells.
  • Technology Insights: Learn about the Mega CNC for matching battery strings and the Megacell Charger for rigorous cell testing.
 
 

Some of our newest products

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MULTICOMP PRO RPI4-MP-STARTER KIT-WHITE-4GB
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Raspberry-Pi 4 Starter KIT-WHITE-4GB – MegaCnC Preinstalled

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$124.20
 Raspberry Pi Starter Kit 
Kit includes:
  • Raspberry Pi 4 Model B
  • with 4GB RAM
  • 5.1V, 3A power supply
  • 16GB Micro SD card
  • MegaCnC software installed
  • 1M Micro HDMI to HDMI cable
  • two-piece heat sink kit
  • molded enclosure (white)
  • getting started booklet
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-16%New
48v Metal Box Kit lifepo4
48V kit lifepo4
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48v 280ah Metal Box Kit

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$550.80 – $2 019.60piece
Elevate your energy storage solutions with our 48V Battery Assembly Kit, tailored for 16 LifePo4 cells ranging from 280Ah to 302Ah. This comprehensive package includes a high-capacity 200A BMS for superior power management, alongside essential assembly components like cables and screws. Ideal for building robust and efficient 48V battery systems for a variety of applications. Application : Home Energy Storage Battery  
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-15%New
12V Battery kit Lifepo4 280Ah - 302Ah
12V Battery kit content
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12v 280ah Metal Box Kit

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$226.80 – $594.00piece
This all-in-one kit includes a durable full metal box to protect and cool your cells, ensuring longevity and efficiency. High-quality M8 Terminal Connectors provide secure, low-resistance connections, while the state-of-the-art JK BMS with 1A Balance meticulously manages cell health, enhancing battery life and performance.
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Multi-slot combining cable with multiple connectors.
Multi-slot combining cable with multiple connectors.
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8 x XS12 Multi-Slot Combining Cable

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$17.28piece
8 x XS12 Multi-Slot Combining Cable. This cable is perfect for combining multiple slots from MCCPRO to charge or discharge large cells. This cable comes with 2 x external temperature sensors. Using 8 slots, you can achieve a total of 36A Charging and 24A discharging (16A discharging on MCCPRO-Hobby)
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Image of an Alligator Connector attached to a Temperature Sensor, depicting a small, metallic clip and a sensor probe for accurate temperature readings, suitable for educational or technical use
Image of an Alligator Connector attached to a Temperature Sensor, depicting a small, metallic clip and a sensor probe for accurate temperature readings, suitable for educational or technical use.
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Alligator Connector with temperature sensor

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$4.32piece
This accessory is compatible with MCCPRO Hobby and Commercial version. It's designed to extend the cell testing capabilities to other cell formats such as pouch cells, prismatic cells or large cylindrical cells.
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A charger designed for electric bicycles and scooters.
Battery Charger for electric Bicycles, Scooters
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42V 5A Battery Charger for electric Bicycles, Scooters

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$75.60piece
This specialized charger is tailor-made for electric bicycles and scooters, ensuring a seamless and reliable recharge for your eco-friendly rides. With compatibility for various electric vehicle models, this charger is a must-have accessory for anyone looking to maintain their electric mobility. Keep your adventures going with this efficient and convenient charging solution.
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Compact refrigerator ozonizer neatly placed inside a fridge, actively working to purify and deodorize the interior, showcasing its efficiency in maintaining food freshness.
Compact refrigerator ozonizer neatly placed inside a fridge, actively working to purify and deodorize the interior, showcasing its efficiency in maintaining food freshness.
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Refrigerator ozone air purifier

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$32.40piece
 
The image features a compact and efficient refrigerator ozonizer, strategically placed inside a fridge. This small device is in operation, highlighting its role in purifying the air and eliminating unwanted odors within the refrigerator. The design of the ozonizer is sleek and modern, making it a subtle yet powerful addition to any kitchen appliance. The visual emphasizes the ozonizer's effectiveness in preserving food freshness and maintaining a cleaner, more hygienic environment in the refrigerator. This image appeals to anyone looking to enhance their food storage practices with advanced, health-conscious technology.
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Portable car ozonizer in a vehicle, actively purifying the air, showcasing its compact and efficient design
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Car Ozonizer 12V/DC

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$12.96piece
This image features a modern, portable car ozonizer, neatly placed within a vehicle's interior. The device, compact in design, is shown in the midst of purifying the car's air, indicating its effectiveness in removing odors and improving air quality. Its sleek and unobtrusive appearance blends seamlessly with the car's environment, illustrating how technology can enhance everyday driving experiences without being intrusive. This visual is particularly appealing to car owners looking for a simple, efficient solution to maintain a fresh and clean atmosphere in their vehicles.
 
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Major Firmware Update Announcement: Introducing Compatibility with Mega CNC

Uncategorized

We are thrilled to announce a significant firmware upgrade that will enhance the performance and capabilities of your Megacell chargers. This upgrade is a part of our continuous effort to provide you with the best possible experience and to ensure that our products meet your evolving needs.

 

Introducing Compatibility with Mega CNC

Our latest firmware has been designed to work seamlessly with the open-source Mega Command and Control (Mega CNC) software. This integration brings a host of benefits, especially when Mega CNC is installed on a Raspberry Pi 4. Not only does this setup allow for a separation from your desktop machine, but it also enables your system to run 24/7 with minimal power consumption. To facilitate this, we are offering ready-configured kits, which include a Raspberry Pi 4 with Mega CNC pre-installed, available for purchase on our website: Raspberry Pi 4 Starter Kit with MegaCNC Pre-installed.

 

Mandatory Firmware Update for Mega CNC and Megacell Regular

Please note that this firmware update is mandatory for those planning to use the Mega CNC software with the old version of mega cell charger. It is compatible with all Megacell chargers (excluding 3D-Printed version). We are aware that the version with 3D Printed shrouds may require additional adjustments for compatibility with the new firmware. We are keen to understand if there is a demand for this and would appreciate your feedback if you are using such models and are interested in the upgrade.

 

Support and Feedback

We are committed to supporting you through this transition. For more details about the firmware upgrade and instructions on how to implement it, please visit our GitHub page: Mega CNC Firmware Update

Your support and contributions are invaluable to us. If you wish to support our ongoing development and improvements, donations are welcome via Stripe (Donate via Stripe) or PayPal (Donate via PayPal).

 

We thank you for your continued support and are confident that you will find this firmware update to be a significant improvement to your Megacell charging setup. Should you have any questions or require further assistance, please do not hesitate to contact us.

 

 

 

Our most wanted products…

A sheet of 320 labels, each measuring 30mm by 20mm.
A sheet of 320 labels, each measuring 30mm by 20mm.
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Phomemo 30 × 20 Thermal Label

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$4.32piece
This set includes 320 labels, each measuring 30mm by 20mm, designed to help you streamline your lithium cells organization. It's also useful for for labeling files, products, or items around your home or office, these convenient labels provide ample space for clear and concise identification. Keep everything in order with this comprehensive labeling solution
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Megacell Charger PRO Hobby beginner pack
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MCC PRO Hobby – Beginner Pack

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$288.36piece
This device is perfect for small to large scale application for capacity testing and cycle testing on lithium cells with a charging voltage between 3.5V to 4.4V, supporting 18650 cell type by default. Using the XS12 connectors and accessories, you can then support a wider range of cell sizes.
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DIY PCB for 18650 Battery Module, showcasing a detailed printed circuit board designed specifically for assembling a battery module using 18650 cells. The image focuses on the intricate circuitry and connections on the PCB, suitable for electronics enthusiasts and professionals
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18650 Battery Module mounted kit

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$8.64piece
The image displays a meticulously crafted DIY PCB, tailored for a 18650 battery module, capturing the essence of custom electronic design. It shows the circuit board's clean layout, emphasizing the spots designated for 18650 cells, along with various electronic components and connection points. The PCB is presented in a way that highlights its compact design and functional elegance, appealing to DIY enthusiasts and professionals in battery technology. The focus on the board's details underscores the precision required in building personalized power solutions, making it an informative and inspiring visual for those passionate about electronics and battery assembly.
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Image of 18650 Li-Ion Cell with 2900-3200 mAh Capacity from E-Bike Battery Packs.
Image of 18650 Li-Ion Cell with 2900-3200 mAh Capacity from E-Bike Battery Packs.
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18650 Li-Ion Cell from E-Bike Battery Packs, 2900-3200 mAh Capacity

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$1.94piece
18650 Li-Ion Cells From E-Bike Battery Packs, 3.7v-4.2v tested. Recovered from E-Bike battery packs.
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MCCPRO Commercial Back
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Lithium-ion Cell Testing Device Megacell Charger PRO Commercial

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$777.60piece
This device is perfect for small to large scale application for capacity testing and cycle testing on lithium cells with a charging voltage between 3.5V to 4.4V, supporting a wide range of cells, 18650, 21700, 26650, 32600, 32900, and any 34mm to 90mm round cells with a diameter smaller than 35mm.
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Announcing the Release of Mega Command & Control Application: Elevating Precision in Lithium Testing Operations

Hardware

I am excited to share with you the latest advancement from our development efforts – the release of the Mega CNC application. This application is the result of the collaborative innovation between 3D-Brothers and DeepCycle-Power, both under my leadership, ensuring a seamless integration and reliable performance.

 

The Mega CNC application has been meticulously crafted to enhance the efficiency and precision of controlling the megacell charger lithium testing devices. It is hosted on an Ubuntu virtual machine, providing a robust and secure environment for its operation. Our commitment to accessibility and community engagement has led us to release this application as open-source software, allowing for widespread adoption and collaborative improvement.

 

You can access the application and its comprehensive documentation at the following GitHub link: Mega CNC on GitHub.

 

I encourage you to explore the application, and I am confident that it will exceed your expectations in terms of performance and reliability. The installation process is straightforward, and I have prepared a detailed guide and video walkthrough to assist you every step of the way.

 

While the Mega CNC application is available at no cost, we welcome and appreciate any support for the ongoing development and enhancement of this project. If you wish to contribute, please visit the following links:

Your feedback and insights are invaluable to us as we continue to refine and expand the capabilities of the Mega CNC application. Please do not hesitate to reach out with your thoughts or inquiries.

megacnc-1
megacnc-2

Thank you for your support and interest in our work. Together, we are driving innovation in CNC technology and opening new possibilities for the industry.

Our most wanted products...

-11%
5V 40A Power Supply for megacell charger PRO
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5V 40A PSU For MCC Regular

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Original price was: $48.60.Current price is: $43.20.piece
This 5V 40A Power Supply Unit (PSU) is designed to deliver a stable and high-current output, making it ideal for powering various electronic devices and projects, including the Megacell Charger first version. It features efficient performance and reliability for your power requirements and it also has a fan for active cooling.
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MCCPRO Commercial Back
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Lithium-ion Cell Testing Device Megacell Charger PRO Commercial

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$777.60piece
This device is perfect for small to large scale application for capacity testing and cycle testing on lithium cells with a charging voltage between 3.5V to 4.4V, supporting a wide range of cells, 18650, 21700, 26650, 32600, 32900, and any 34mm to 90mm round cells with a diameter smaller than 35mm.
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Lithium-ion Cell Testing Device Megacell Charger PRO Hobby

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$245.16 – $331.56piece
This device is perfect for small to large scale application for capacity testing and cycle testing on lithium cells with a charging voltage between 3.5V to 4.4V, supporting 18650 cell type by default. Using the XS12 connectors and accessories, you can then support a wider range of cell sizes.
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5V 20A power supply unit
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5V 20A PSU For MCC Regular

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$27.00piece
Introducing our 5V 20A Power Supply Unit (PSU), a compact and reliable solution to meet your high-current power needs. This PSU is designed to provide a stable 5V output, making it perfect for powering a wide range of electronic devices and DIY projects. Whether you're a hobbyist or a professional, this PSU is an essential addition to your toolkit.
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High-current 5V 60A power supply unit for electronics
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5V 60A PSU For MCC Regular

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$59.40piece
Discover our high-performance 5V 60A Power Supply Unit (PSU), designed to deliver exceptional power output for demanding electronics applications. With its robust design and ample current capacity, this PSU is the perfect choice for professionals and enthusiasts alike. Ensure your projects run smoothly and reliably with this powerhouse of a power supply.
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Unveiling the Mysteries of the Luna 2000 Battery: A Deep Dive with the Cell Doctor

Hardware

In the ever-evolving world of renewable energy, understanding the technology behind our tools is key to maximizing their potential. In our latest video on the Cell Doctor channel, we embark on a fascinating exploration of the Luna 2000 battery, a prominent player in the solar energy sector.

Join us as we delve into the heart of this advanced battery system. Unlike conventional batteries used in solar panels, the Luna 2000 boasts unique features and complex engineering. Our video provides a rare glimpse inside this sophisticated unit, offering viewers a detailed look at what sets the Luna 2000 apart in the world of renewable energy storage.


luna2000-disassembly
luna2000-disassembly_02

For those intrigued by solar technology and eager to learn more about the components that power their homes and businesses, this video is an invaluable resource. We start by introducing the Luna 2000, outlining its significance in the solar energy industry. Then, we take a step further – disassembling the unit to reveal its inner workings. 

Our most wanted products...

-11%
5V 40A Power Supply for megacell charger PRO
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5V 40A PSU For MCC Regular

Rated 0 out of 5
Original price was: $48.60.Current price is: $43.20.piece
This 5V 40A Power Supply Unit (PSU) is designed to deliver a stable and high-current output, making it ideal for powering various electronic devices and projects, including the Megacell Charger first version. It features efficient performance and reliability for your power requirements and it also has a fan for active cooling.
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MCCPRO Commercial Back
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Lithium-ion Cell Testing Device Megacell Charger PRO Commercial

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$777.60piece
This device is perfect for small to large scale application for capacity testing and cycle testing on lithium cells with a charging voltage between 3.5V to 4.4V, supporting a wide range of cells, 18650, 21700, 26650, 32600, 32900, and any 34mm to 90mm round cells with a diameter smaller than 35mm.
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Lithium-ion Cell Testing Device Megacell Charger PRO Hobby

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$245.16 – $331.56piece
This device is perfect for small to large scale application for capacity testing and cycle testing on lithium cells with a charging voltage between 3.5V to 4.4V, supporting 18650 cell type by default. Using the XS12 connectors and accessories, you can then support a wider range of cell sizes.
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5V 20A power supply unit
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5V 20A PSU For MCC Regular

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$27.00piece
Introducing our 5V 20A Power Supply Unit (PSU), a compact and reliable solution to meet your high-current power needs. This PSU is designed to provide a stable 5V output, making it perfect for powering a wide range of electronic devices and DIY projects. Whether you're a hobbyist or a professional, this PSU is an essential addition to your toolkit.
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High-current 5V 60A power supply unit for electronics
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5V 60A PSU For MCC Regular

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$59.40piece
Discover our high-performance 5V 60A Power Supply Unit (PSU), designed to deliver exceptional power output for demanding electronics applications. With its robust design and ample current capacity, this PSU is the perfect choice for professionals and enthusiasts alike. Ensure your projects run smoothly and reliably with this powerhouse of a power supply.
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Our detailed walkthrough covers the structural aspects of the battery, from its intricate circuitry to its efficient design. This hands-on approach not only demystifies the technology but also provides practical insights for enthusiasts and professionals alike. Whether you’re a DIY solar hobbyist or a seasoned technician, understanding the internals of such batteries is crucial for maintenance, troubleshooting, and optimization.

The Luna 2000 is more than just a power storage device; it’s a testament to the advancements in renewable energy technology. By breaking down its components, we highlight the innovation that goes into creating efficient, sustainable power solutions.

We invite you to watch our comprehensive video for a closer look at the Luna 2000 battery. Discover the nuances that make this battery a cornerstone of modern solar power systems and gain a deeper appreciation for the technology that’s driving us towards a more sustainable future.

Stay tuned to the Cell Doctor channel for more insightful content on renewable energy technologies, where we aim to enlighten and inspire our viewers with the wonders of modern engineering in the field of sustainability.

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12V 280Ah DIY Battery

Building a High-Capacity 12V 280Ah LiFePO4 Battery: A DIY Guide

Design Electronics Hardware

Hey everyone! Welcome to a new video / article. Today, I’m excited to share with you a detailed tutorial on building a 12V 280Ah LiFePO4 battery from scratch. This battery is perfect for solar storage, RVs, and off-grid applications, and I’ll walk you through every step of assembling your own high-capacity battery.

We’ll start with the basics, including selecting the right lithium phosphate cells and the necessary components like wires and battery cases.

Building your own battery not only saves costs but also ensures you have a reliable and efficient power source tailored to your specific needs. Whether you’re a DIY enthusiast or looking to become more energy independent, this video will provide you with the knowledge and skills needed.

Remember, this video isn’t just about assembling parts; it’s about empowering you to create something that can make a real difference in your life. So, dive into the tutorial, and don’t forget to like, share, and subscribe for more DIY energy projects!

I’ve packed this video with valuable tips and practical advice, ensuring you have a smooth and successful build. Watch the full video to catch every detail and nuance of this exciting project. Happy building!

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Reviving a Neglected Electric Scooter: A DIY Guide by the Cell Doctor

Electronics Hardware

Electric scooters have become a convenient mode of transportation in urban areas. However, like any electronic device, they require regular maintenance to ensure longevity and performance. In a recent video by the Cell Doctor, a common issue faced by electric scooter owners was addressed: what happens when an e-scooter is left uncharged for an extended period?

Alex, the host, demonstrates a scenario with an ES scooter that hasn’t been charged for over a year. When he attempts to charge the scooter, he faces a challenge – the scooter does not respond. This lack of response suggests that the batteries are dead. The scooter, interestingly, is equipped with two batteries, doubling the complexity of the problem.

The video delves into the intricacies of battery maintenance for electric scooters. It highlights the importance of regular charging, even when the scooter is not in use. The neglect results in battery degradation, which might lead to a complete battery failure as seen in the video.

Alex’s approach to resolving this issue serves as a DIY guide for individuals facing similar problems. He takes the viewers through a step-by-step process, explaining the technical aspects of scooter batteries and the right way to diagnose and fix the issue.

The repair process is not just about replacing the batteries but understanding the underlying causes of battery degradation. Alex emphasizes the need for regular battery checks and the importance of proper storage conditions for electric scooters.

This video is a must-watch for e-scooter enthusiasts and owners, providing valuable insights into the maintenance of these modern urban vehicles. It serves as a reminder that while electric scooters offer convenience and eco-friendliness, they also demand responsible usage and care.

E-scooter-battery-repair
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3kw inverter

Exploring the World of Inverters with Alex from Deep Cycle Power

Electronics Hardware

Welcome to another enlightening episode on the Cell Doctor channel, where technology and practical solutions converge. Today, we’re diving into the realm of power inverters with our expert, Alex, from the ‘Deep Cycle’ segment.

Inverters are crucial in converting stored energy into usable electricity, especially in off-grid setups, RVs, boats, or for backup power in homes. They are the unsung heroes in our daily lives, providing the convenience of electricity where direct connection to the grid is not possible.

In this quick yet comprehensive video, Alex introduces us to a robust 3 kW inverter, showcasing not just its technical specifications but also its real-world applications. He walks us through the setup, explaining the nuances that make this inverter a standout choice for various needs.

Whether you’re a seasoned off-grid enthusiast or new to the world of deep cycle batteries and inverters, this video promises to be a treasure trove of information. Alex’s expertise shines as he demystifies the complex world of power conversion, making it accessible and understandable for all.

The focus on this particular 3 kW inverter provides viewers with an insight into what features to look for when choosing an inverter. From power output capabilities to efficiency and safety features, Alex covers it all.

So, if you’ve ever wondered how to keep your devices running smoothly during a camping trip, or how to manage your home’s backup power more efficiently, this video is for you. Join Alex on this informative journey and discover how the right inverter can revolutionize your approach to power usage and management.

Stay tuned to the Cell Doctor channel for more insights into the world of deep cycle batteries and inverters, where we empower you with the knowledge to make informed decisions about your power needs.

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