Samsung INR21700-30T 3000mAh
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Description
Samsung INR21700-30T 3000mAh – 35A Continuous Discharge Industrial Cell
The Samsung INR21700-30T is a high-drain lithium-ion 21700 cell manufactured by Samsung SDI. It is engineered for stable high current delivery, low internal resistance and controlled voltage behaviour under load.
This is an unprotected industrial cell and must only be used in regulated systems equipped with appropriate battery management and protection circuitry.
Cell Identity & Core Specifications
View Core Technical Data
Parameter
Specification
Manufacturer
Samsung SDI
Model
INR21700-30T
Format
21700 Flat Top
Typical Capacity
3000 mAh
Rated Minimum Capacity
2900 mAh
Nominal Voltage
3.6 V
Max Charge Voltage
4.20 V
Cut-off Voltage
2.5 V
Current & Charging Parameters
View Discharge & Charge Ratings
Parameter
Specification
Continuous Discharge Rating (CDR)
35 A
Standard Charge Current
1.5 A (recommended)
Maximum Charge Current
4.0 A
AC Internal Resistance
≤ 7 mΩ (1kHz)
Charging above 1.5A may accelerate long-term degradation and reduce cycle life.
Dimensions & Weight
View Physical Specifications
Parameter
Specification
Diameter
Max 21.4 mm
Height
Max 70.4 mm
Weight
Approx. 67–70 g
Operating Temperature
View Temperature Limits
Condition
Range
Charge
0°C – 50°C
Discharge
-20°C – 60°C
Application Context
Designed for regulated high-current systems requiring up to 35A continuous discharge. The 30T prioritises current capability over extended runtime.
Battery Safety Notice
- Never carry loose batteries in pockets.
- Do not use cells with damaged wraps.
- Avoid contact with metal objects.
- Use dedicated 21700 lithium-ion chargers.
- Discontinue use if overheating or abnormal behaviour occurs.
- Use in unregulated systems requires full understanding of Ohm’s Law and battery safety limits.
Technical FAQ – Samsung INR21700-30T
Is 35A the official rating?
What is the rated minimum capacity?
Why is internal resistance important?
This product is intended for adults aged 18+ in Ireland.
Last updated: 19 February 2026 – Verified against official Samsung SDI datasheet.