Samsung 18650 Battery Cells | 1500mAh–3500mAh

Differences Between 26F, 26J, 26JM, 26FM Models
✅ Samsung 26F, 26J, 26JM, and 26FM are closely related Samsung 18650 cells. 26F is an older model with moderate capacity, 26J is an improved version with higher discharge performance, 26JM is a mid-range variant optimized for energy and power balance, and 26FM is a special batch often used for OEM applications. Understanding these differences helps in selecting the right genuine high-drain SDI cell for your 3.6V or 3.7V device.
Samsung Cell Colors – What Green, Purple, Brown, and Blue Mean
✅ Samsung 18650 cells come in different colors to indicate chemistry and performance characteristics. Green typically represents standard INR high energy cells, Purple indicates high capacity energy cells, Brown is sometimes used for legacy or high-drain older models, and Blue usually identifies newer high-drain INR models. These color codes help distinguish the intended applications such as vape, flashlight, or e-bike batteries.
INR vs ICR – Difference
✅ Samsung 18650 cells come in INR (Nickel Manganese Cobalt, high energy & moderate high-drain) and ICR (Lithium Cobalt, higher energy density but lower high-drain) variants. In practice, unless a device requires extremely high discharge rates, the difference between INR18650 and ICR18650 is minor. Users can rely on the authentic Samsung SDI rechargeable lithium li-ion cells for safe and efficient performance.
Samsung and LiFePO4 – Clarifying Chemistry
✅ Samsung SDI has never manufactured LiFePO4 (LFP) cells. Their focus has always been on INR/NCA chemistry, providing high energy density and high-drain performance. Any lithium-ion cell marketed as Samsung LFP should be considered non-genuine or misrepresented. For reliable 3.6V or 3.7V devices such as vapes, flashlights, or e-bikes, only genuine INR/ICR Samsung cells should be used.