The 18650 Lithium-Ion Rechargeable Battery Cell (frequently listed by select retail brands or importers under the custom name 18675) is a highly efficient, cylindrical energy storage cell widely used to power portable electronics. The standard “18650” designation directly specifies its dimensions: 18 mm in diameter and 65 mm in length. Variants that feature an integrated protection circuit board (BMS) welded to the bottom add 2 to 3 mm of extra height, pushing the absolute length to 67.5 mm–68 mm. It serves as the primary power cell for high-intensity flashlights, laptop power banks, wireless IoT nodes, and custom DIY battery packs.
✨ Key Features
- Cylindrical Form Factor Sizing: Built to a strict industrial footprint that matches standard single-cell plastic mounting holders and leaf-spring contact plates.Â
- High Operational Energy Density: Packs a high capacity-to-weight ratio compared to NiMH or Alkaline cells, keeping mobile builds lightweight.Â
- Integrated Safety Options: Available in flat-top configurations for spot-welding pack clusters, or button-top protected configurations that guard against over-discharge.Â
- Zero System Memory Effect: Retains its full charging capacity over hundreds of cycles even when topped off from a partially discharged state.
Reviews
There are no reviews yet.