3.6V-2500mAh Samsung-INR-18650-25R Battery
INR18650-25R–20A
The Samsung INR18650 25R battery comes up with a nominal capacity of 2500mAh, the voltage of 3.6V .
Samsung inr18650-25r is a well-balanced sensor in terms of performance and reliability. The battery has a medium-caste capacity of 2500mah, but still has a continuous discharge current of 20 amps (air temperature is interrupted! ). Even if it is hit by a high current, the sensor can remain stable. Due to the balance of capacity and discharge current, Samsung 25r is suitable for many purposes, including: homemade batteries, high-power batteries, power tools and even high-power lamps. (However, if the lamp does not have its own protection, please don’t forget to use a battery with a protection circuit in the headlight. )
This is an absolutely excellent cell for anyone seeking high performance 18650 cells.
HIGHLIGHTS OF INR18650 25R
Nominal discharge capacity: 2,500mAh
Nominal voltage: 3.6V
Standard charge: CCCV, 1.25A, 4.20 ± 0.05 V, 100mA cut-off
Rapid charge: CCCV, 4A, 4.20 ± 0.05 V, 100mA cut-off
Charging time: Standard charge : 180min / 100mA cut-off
Rapid charge: 60min (at 25°C) / 100mA cut-off
Max. continuous discharge: 20A
Discharge cut-off voltage: 2.5V
APPEARANCE
There shall be no such defects as deep scratch, crack, rust, discoloration or leakage, which may adversely affect the commercial value of the cell.
Diameter : 18.33 ± 0.07mm
Diameter is defined as the largest data value measured on the “A” area of a cylindrical cell.
Height :64.85 ± 0.15mm
Nominal Specification of Samsung-18650-25R
| ltem | Specification |
|---|---|
| Nominal discharge capacity | 2,500mAh |
| Charge: 1.25A,4.20V,CCCV 125mA cut-off | |
| Discharge: 0.2C,2.5V discharge cut-off | |
| Nominal voltage | 3.6V |
| Standard charge | CCCV,1.25A,4.20± 0.05 V,125mA cut-off |
| Rapid charge | CCCV,4A,4.20±0.05 V,100mA cut-off |
| Charging time | Standard charge:180min/125mA cut-off |
| Rapid charge: 60min (at 25℃)/ 100mA cut-off | |
| Max. continuous discharge(Continuous) | 20A(at 25℃),60% at 250 cycle |
| Discharge cut-off voltageEnd of discharge | 2.5V |
| Cell weight | 45.0g max |
| Cell dimension | Height:64.85±0.15mm |
| Diameter:18.33±0.07mm | |
| Operating temperature(surface temperature) | Charge:0 to 50℃(recommended recharge release(45 ℃) |
| Discharge:-20 to 75℃(recommended re-discharge release(60 ℃) | |
| Storage temperature(Recovery 90% after storage) | 1.5 year -30~25℃ |
| 3 months -30~45℃ | |
| 1 month -30~60℃ |
Update Testing Curves
Note:
If the cell is kept as ex-factory status (50±5% SOC, 25℃), the capacity recovery rate is more than 90% of 10A discharge capacity 100% is 2,450mAh at 25℃ with SOC 100% after formation.
Characteristics
Standard charge
This “Standard charge” means charging the cell CCCV with charge current 0.5CmA(1,250mA), constant voltage 4.2V and 125mA cut-off in CV mode at 25℃ for capacity. .
Rapid charge
Rapid charge means charging the cell CCCV with charge current 4A and 100mA cut-off at 25℃
Nominal discharge capacity
The standard discharge capacity is the initial discharge capacity of the cell, which is measured with discharge current of 500mA(0.2C) with 2.5V cut-off at 25℃ within 1hour after the standard charge. Nominal discharge capacity ≥ 2,500mAh Which complying to the minimum capacity of IEC61960 standard.
Standard rated discharge capacity
The standard rated discharge is the discharge capacity of the cell, which is measured with discharge current of 10A with 2.5V cut-off at 25℃ within 1hour after the standard charge. Standard rated discharge capacity ≥ 2,450mAh
Initial internal impedance
Initial internal impedance measured at AC 1kHz after standard charge Initial internal impedance ≤ 18mΩ
Temperature dependence of discharge capacity
Capacity comparison at each temperature, measured with discharge constant current 10A and 2.5V cut-off after the standard charge is as follows.
| Discharge temperature | ||||
|---|---|---|---|---|
| -20℃ | -10℃ | 0℃ | 25℃ | 60℃ |
| 60% | 75% | 80% | 100% | 100% |
Note:
If charge temperature and discharge temperature is not the same, the interval for temperature change is 3 hours. Percentage index of the discharge at 25℃ at 10A (=2,450mAh) is 100%.
Temperature dependence of charge capacity
Capacity comparison at each temperature, measured with discharge constant current 10A and 2.5V cut-off after the standard charge is as follows.
| Charge temperature | Discharge temperature | |||||
|---|---|---|---|---|---|---|
| 0℃ | 5℃ | 25℃ | 45℃ | 50℃ | 25℃ | |
| Relative capacity | 80% | 90% | 100% | 95% | 95% | |
Note:
If charge temperature and discharge temperature is not the same, the interval for temperature change is 3 hours. Percentage as an index of of the Rated discharge capacity(=2450mAh) is 100%.
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