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| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Model | ICR18650-26J1 | Manufacturer | misenpower |
| Cell Chemistry | Rechargeable lithium-ion, ICR | Cell Format | 18650 cylindrical bare cell with integrated PTC |
| Nominal Voltage | 3.63V | Nominal Capacity | 2600mAh at 520mA discharge to 2.75V |
| Minimum Capacity | 2550mAh at 520mA discharge to 2.75V | Nominal Energy | Approx. 9.44Wh, calculated from 3.63V × 2.6Ah |
| Charging Method | Constant current-constant voltage, CC-CV | Charging Voltage | 4.20 ± 0.05V |
| Standard Charge | 1300mA; approximately 3 hours | Rapid / Maximum Charge | 2600mA at 25°C; approximately 2.5 hours |
| Maximum Discharge Current | 5200mA at 25°C | Discharge Cut-off Voltage | 2.75V |
| Initial AC Impedance | ≤100mΩ, measured at 1kHz after rated charge | Cycle-Life Criterion | ≥1785mAh after 299 cycles plus specified follow-up measurement |
| Cell Dimensions | Diameter: 18.40mm max.; height: 65.00mm max. | Cell Weight | 45.0g maximum |
| Operating Temperature | Charge: 0°C to 45°C; discharge: -20°C to 60°C | Ex-Factory Status | 50% charged; OCV from 3.55V to 3.75V |
| Storage for ≥80% Recovery | 1 year: -20°C to 25°C; 3 months: -20°C to 45°C; 1 month: -20°C to 60°C | Integrated PTC | 2.9A hold current; 7-16mΩ initial resistance; 28mΩ max. after trip |
The Samsung SDI ICR18650-26J1 is a rechargeable cylindrical lithium-ion cell offering 2600mAh nominal capacity, 3.63V nominal voltage and a manufacturer-specified maximum discharge current of 5.2A. Its energy-oriented performance, integrated PTC and standard 18650 dimensions make it suitable for professionally engineered portable-electronics, instrumentation and moderate-current battery packs requiring dependable runtime and controlled electrical protection.
The cell provides 2600mAh nominal and 2550mAh minimum capacity when discharged at 520mA to 2.75V after standard charging. Combined with its 3.63V nominal voltage, this produces approximately 9.44Wh of calculated nominal energy for compact battery-pack designs.
Samsung specifies a maximum discharge current of 5200mA at 25°C with a 2.75V discharge cut-off. The rate-capability test records approximately 80% relative capacity at this 2C current, making the cell suitable for moderate-current loads rather than high-drain power applications.
Standard charging uses 1300mA constant current followed by constant-voltage charging at 4.20V, with a stated charging time of approximately three hours. Rapid charging uses 2600mA at 25°C and takes approximately 2.5 hours under the manufacturer’s specified conditions.
The cell includes a PTC with a specified 2.9A hold current, 7-16mΩ initial resistance and maximum resistance of 28mΩ after tripping. This device contributes to cell-level protection but does not replace pack-level overcharge, over-discharge, short-circuit and thermal safeguards.
The cycle test uses 1300mA charging and 1300mA discharging to 2.75V. Following the specified 299-cycle sequence and subsequent capacity measurement, the remaining-capacity criterion is at least 1785mAh, equivalent to 70% of the 2550mAh reference capacity at 25°C.
With maximum dimensions of 18.40mm diameter and 65.00mm height, the cell supports established cylindrical-pack layouts. Samsung requires welded terminal connections, protection against sleeve damage, separation from heat sources and mechanical shock protection within the finished battery assembly.
Custom battery pack applications: Suitable applications include portable instruments, monitoring equipment, professional electronics, lighting systems, compact backup power and other moderate-current devices with validated load requirements. MisenBattery supplies Samsung SDI cells and supports custom pack integration using a compatible BMS or PCM, fuse protection, welded interconnects, voltage and temperature sensing, cell insulation, safe spacing, and appropriate thermal and mechanical design. Supporting CE, UN38.3, RoHS and UL documentation can be provided for the applicable product and shipment.
