Pin Samsung INR18650-30Q

Samsung INR18650-30Q 3000mAh

 

Official specifications:

• Internal resistance (1kHz): <18mOhm
• Internal resistance (DC): <30mOhm
• Charge method: CC-CV (4.2V+/-0.05V, 100mA cut-off)
• Standard charge current: 1.5A
• Fast charge current: 4A
• End voltage: 2.5V
• Max. continuous current: 15A
• Rated discharge capacity (0.2C): 3000mAh
• Rated discharge capacity (10A): 2700mAh
• Cycle life: 300 cycles to 70% (4A charge and 15A discharge)
• Cycle life: 250 cycles to 70% (4A charge and 22A discharge, pause at 70°C, resume at 50°C)

Modern high current cells with lots of capacity.




Very good discharge curves, capacity is nearly constant and they track perfectly. Even the 20A curve maintains a decent voltage, but as can be seen below the cell gets warm.
The tail on some curves is because I continue to record after stopping the discharge (If the cell is hot), i.e. it shows how much the voltage recovers.



The cell will heat up at a 10A load, but it is rated for it.





The cell can also handle 20A for some time, but you are supposed to stop when it gets hot (As I do here).
Remember the chart shows above ambient temperature, the actual cell temperature goes above 75°C.















Conclusion

This cell is very good, it can handle about 15A continuous discharge and has no problems with 20A pulses.