The Panasonic NCR18650B is a high-capacity 18650 lithium-ion rechargeable cell, well-regarded for its reliability and energy density. With a typical capacity of 3350–3400mAh and a nominal voltage of 3.6V, it delivers long-lasting power in a compact cylindrical form. Designed for efficiency and stability, the NCR18650B is ideal for applications that require extended runtime rather than high-drain output, such as flashlights, battery packs, laptops, and DIY energy storage systems.
Panasonic 18650B Specification
- Nominal voltage: 3.6V
- Fully charged voltage: 4.20V
- Discharge cut-off: 2.5v
- Continuous discharge: 4.9A
- Nominal capacity: 3400mAh
- Protection circuit: No
- Style: Flat Top
- Diameter: 18mm
- Height: 65mm
Panasonic 18650B Strengths
High energy density: Good capacity in a standard 18650 size, making it attractive for applications where runtime is more important than high current draw.
Good reliability and reputation: It has been widely used and has a proven track record in battery packs, flashlights, DIY energy storage, etc.
Balanced design: It’s not pushing extreme current, which helps with thermal stability and longevity when used within spec.








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