Articles and Resources
Check out our guides and thoughts on DIY battery building. We will update this page as often as we can with new content, guides, and news.
Copper vs Nickel in Lithium-Ion Battery Series Conductors: Real-World Voltage Drop & Resistance Tests
We compare nickel and copper as lithium-ion battery series conductors using real-world voltage drop and resistance tests. See how adding copper dramatically lowers resistance and improves performance.
How Lithium Battery Chargers Work: DIY Tips, CC-CV Basics & Safety Guide
From EVs to solar power stations, lithium battery chargers are everywhere. This guide explains how they work, why constant current–constant voltage (CC-CV) is critical, and how to build one yourself. Perfect for tech hobbyists and battery pros.
The Ultimate Guide to 12V Lithium-Ion Batteries: Build, Charge, and Use
12V lithium-ion batteries are the backbone of countless modern devices—from inverters to lights and fans. This guide breaks down how to build, charge, and safely use them, plus how to choose the right chemistry for your application.
13 Common Myths About E‑Bike Batteries, Controllers & Wiring—Busted!
Upgrading your e‑bike or EV battery doesn’t have to be confusing. This guide breaks down 13 common myths about batteries, controllers, wiring, and pack design—helping you avoid mistakes and make smarter upgrade choices.
Do Batteries Expire?
Your standard alkaline AA, AAA, C, D and 9 V batteries have a shelf life of about five to ten years, which is really long. But those batteries definitely expire: after so many years, the unavoidable 2–3 % per year self-discharge inevitably leads to a dead alkaline battery. The thing is, you cannot recharge them.
What Is A Voltage Regulator?
A voltage regulator is a device that stabilizes a system’s voltage under varying load conditions. For example, the DC output from an alternator can fluctuate between 13 V and 15 V, but to charge a car battery you need a steady voltage. The regulator—either built into the alternator or installed separately—ensures that the battery sees a constant charging voltage. Similarly, when converting AC to DC, you typically use a transformer to step the AC voltage down, then a bridge rectifier to produce DC. That raw DC is often very “choppy,” and while capacitors help smooth it out, sensitive electronics generally require a more precise regulation stage.
The Best USB PD Module
USB Power Delivery (USB PD) is incredibly versatile—used in everything from laptops to battery banks. In this guide, we compare the best USB PD modules for different applications: ultra-compact budget boards, efficient 18650/21700 battery bank modules, and powerful 100W multi-cell options. Whether you're powering small devices or building a portable power station, there's a perfect PD module for your needs
How Long Does A Lithium Ion Battery Last
Thinking about selling lithium-ion batteries? Learn how cycle count, temperature, and charging habits affect battery lifespan — and how to maximize it
A Brief History Of LFP Batteries
LFP batteries have become the backbone of global EV production thanks to their safety, longevity, and now record-low prices. This article explores how LFP chemistry evolved—from early breakthroughs to modern innovations like Blade cells and cell-to-pack designs—and why it’s reshaping the battery industry.