Battery engineering, decoded.
Deep dives on cell chemistry, brand-by-brand replacement battery buyer's guides, and portable power comparisons — written by engineers who actually test the batteries we sell.
More from the journal
High-Capacity 21700 Cells: How 4000mAh Delivers More Runtime and Runs Cooler
21700 cell format and capacity: how CEENR 8.0Ah replacement batteries and PDnation use these cells, and why cell specifications are not pack current ratings.
High-Drain 18650 Cells: Why a 3000mAh Cell Beats Bigger Ones in Power Tools
Discharge current and capacity are different specifications. A look at the 18650 format in CEENR 6.0Ah replacement batteries and the limits of cell comparisons.
How to Maintain & Store Power Tool Batteries (and Make Them Last Years)
The ideal storage charge level, why heat is the #1 killer, charging habits that extend lifespan, winter storage, and when to replace. Works for every 18V/20V lithium pack.
Does Fast Charging Shorten Power Tool Battery Life?
The honest answer: with a charger that manages heat, the impact is minimal — speed isn't the problem, heat is. How 6A fast charging really affects lifespan, and when to be careful.
How Aftermarket Power Tool Batteries Are Made: A Complete Guide
Cells, matching, interconnects, BMS, housing and quality checks: a manufacturing overview and the documents needed to assess a specific product.
Best Replacement Battery for Craftsman V20: A 2026 Buyer's Guide
Compare capacity, cell format, model-specific safety documents, operating limits and fit. Includes tool compatibility and a CEENR-vs-OEM comparison.
Best Replacement Battery for Black+Decker 20V MAX: A 2026 Buyer's Guide
Compare capacity, cell format, model-specific safety documents, operating limits and fit. Includes tool compatibility and a CEENR-vs-OEM comparison.
Best Replacement Battery for Ryobi 18V ONE+: A 2026 Buyer's Guide
Compare capacity, cell format, model-specific safety documents, operating limits and fit. Includes tool compatibility and a CEENR-vs-OEM comparison.
Best Replacement Battery for Bosch 18V: A 2026 Buyer's Guide
Compare capacity, cell format, model-specific safety documents, operating limits and fit. Includes tool compatibility and a CEENR-vs-OEM comparison.
Best Replacement Battery for Porter-Cable 20V MAX: A 2026 Buyer's Guide
Compare capacity, cell format, model-specific safety documents, operating limits and fit. Includes tool compatibility and a CEENR-vs-OEM comparison.
Best Replacement Battery for Worx 20V PowerShare: A 2026 Buyer's Guide
Compare capacity, cell format, model-specific safety documents, operating limits and fit. Includes tool compatibility and a CEENR-vs-OEM comparison.
Best Replacement Battery for Makita 18V LXT: A 2026 Buyer's Guide
Compare capacity, cell format, model-specific safety documents, operating limits and fit. Includes tool compatibility and a CEENR-vs-OEM comparison.
Best Replacement Battery for Milwaukee M18: A 2026 Buyer's Guide
Compare capacity, cell format, model-specific safety documents, operating limits and fit. Includes tool compatibility and a CEENR-vs-OEM comparison.
The USB-C Power Bank That Runs Power Tools: A 2026 Engineering Breakdown
144 Wh, 100W bidirectional USB-C PD and optional Brand Mounts: compare PDnation Pro’s device charging and tool-battery roles with portable power platforms.
Universal Power Tool Battery: The 2026 Guide to Cross-Brand Compatibility
One battery powers DeWalt, Milwaukee, Makita, Bosch, Ryobi, and 5 more brands. How adapters work, what cells matter, and when a universal system saves $300+ versus OEM.
Are Aftermarket DeWalt Batteries Safe? A 2026 Buyer's Guide
Model-specific documents, operating limits, and suitable tool and charger combinations: checks for aftermarket DeWalt batteries.
Inside the CEENR 6.0Ah Battery
Premium high-drain 18650 cells, BMS architecture, and why the 6.0Ah series uses different cells than the 8.0Ah.
Inside the CEENR 8.0Ah Battery
Premium high-drain 21700 cells, thermal design, and why high-current tools like circular saws benefit most from 8.0Ah.
More articles publishing weekly. Battery chemistry, brand-by-brand comparisons, and jobsite power guides coming.