Samsung SDI

Samsung SDI INR21700-40T 21700 4000 mAh (25A)

Samsung SDI Li-Ion-Zelle 40T 21700 4000 mAh (25A)
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With soldering tags
Product number: 10752
Product information "Samsung SDI INR21700-40T 21700 4000 mAh (25A)"
Samsung SDI INR21700-40T Li-ion battery cell in format 21700, nominal voltage 3.6V typical capacity 4000 mAh, max. discharge current 25A

Important Warning

Lithium cells without protection circuit can be operated only with electronic protection circuits and by skilled persons.

Wrong use and short circuits could lead to severe burns or to explosions. Li-ion batteries may be neither overcharged nor discharged.  Moreover, li-ion cells with even the smallest damage or scratch may not be used. 

Please note, that li-ion cells can only be charged with the right chargers.

Technical Details

  • Capacity: 4000mAh (nominal) / 3900mAh (Min.)
  • Nominal Voltage: 3.6V
  • Charging Voltage: 4.2V + 0.05V
  • End-of-Discharge Voltage: 2.50V
  • Charging Current (Max.): 6000mAh (1.5C)
  • Discharging Current (Max.): 25000mAh (ca. 6.5C)
  • Weight: 75g.
  • Dimensions: 21.22 mm Diameter / 70.3 mm Length
  • Operating Temperatures: 0 – 50°C Charging / -20 – 80°C Discharging


  • E-Mobility
  • Consumer Electronic
  • Medical Equipment
  • Measuring Devices
  • Torchlight

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