Samsung 18650 25R – 3.6V 2500mAh Li‑ion Cell (Flat Top)

Genuine Samsung INR18650-25R lithium-ion cells — a proven high-drain 18650 for power tool battery rebuilds, e-bike and scooter packs, flashlights, and DIY projects. Cells only; buy 1, 2, 4, or 8.

Choose your quantity

• 1 cell
• 2 cells
• 4 cells
• 8 cells — best per-cell price

Looking for a storage case? We sell clear protective cases separately in 2-cell and 4-cell sizes.

Specifications

• Model: Samsung INR18650-25R
• Nominal voltage: 3.6V
• Capacity: 2500mAh nominal
• Max continuous discharge: 20A
• Chemistry: Li-ion NMC
• Terminal: Flat top (unprotected)
• Charge cutoff: 4.20V  |  Discharge cutoff: 2.50V
• Dimensions: 18.3mm x 65.0mm

Common uses

Power tool pack rebuilds, e-bike and scooter batteries, vape mods, high-drain flashlights, portable power banks, and custom battery builds.

Important safety information

These are flat-top, unprotected cells intended for pack building and device integration by users who understand lithium-ion handling. They are not drop-in replacements for protected cells and are not suitable for use in devices requiring a protection circuit unless one is added.

• Never charge unattended or exceed 4.20V per cell
• Do not over-discharge below 2.50V
• Use a quality charger designed for Li-ion cells
• Never use cells with damaged wrappers — rewrap before use
• When building packs, use cells of matched capacity and internal resistance

Assembly and use are at your own risk. See our Terms of Service for full details.