You might find the following resources quite helpful.


Second Life Storage. A forum dedicated to DIY 18650 battery builds.

DIY Solar Forum: A forum dedicated to understanding and designing solar systems.

Electromotive Mods: Designer and manufacturer of e-bike, scooter, and other mobility applications. Batteries and equipment reviews with a wealth of info on various 18650s and associated equipment.

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Cylindrical Cells

Lithium Batteries

Check out our collection of lithium 18650 and other-sized cells here.