The Samsung INR21700-40T is a premium high-performance lithium-ion battery cell designed for demanding applications, including electric vehicles, power tools, and portable electronics. With a 4000mAh nominal capacity and 35A continuous discharge rate, it delivers outstanding power output and long-lasting performance.

Built with advanced lithium-ion chemistry for high energy density and long cycle life, this cell maintains consistent output even under heavy load. The cylindrical 21700 form factor (21mm x 70mm) makes it compatible with a wide range of devices, while the built-in protection circuit safeguards against overcharging, over-discharging, and short circuits.

Perfect for both professionals and enthusiasts, the Samsung 40T offers the ideal balance of capacity, safety, and high-drain performance.

Key Features

• High Capacity: 4000mAh for extended runtimes.

• High-Drain Performance: 35A continuous discharge

• Built-in Protection Circuit: Prevents overcharge, over-discharge, and short circuit.

• Versatile Size: 21700 form factor fits a wide range of devices.

• Advanced Lithium-ion Chemistry: High energy density and long cycle life.

• Temperature Tolerance: Operates from -20°C to 60°C.

Specifications

• Model: Samsung INR21700-40T

• Battery Type: Li-ion Rechargeable

• Capacity (Nominal): 4000mAh

• Capacity (Minimum): 3900mAh

• Nominal Voltage: 3.6V

• Charging Voltage: 4.2V

• Cut-off Voltage: 2.5V

• Max Continuous Discharge: 35A

• Max Pulse Discharge: 45A (up to 5s)

• Dimensions: 21mm x 70mm

• Weight: 68g

• Operating Temp: -20°C to 60°C

• Terminal Type: Flat Top

• Protection Circuit: Yes

Package Includes

4 x INR21700-40T Battery Cells

Q1: Can I use this battery in high-drain devices like e-bikes or power tools?
A: Yes, it’s designed for high-drain applications with a 35A continuous discharge capability.

Q2: Does this battery have built-in protection?
A: Yes, it includes overcharge, over-discharge, and short-circuit protection.

Q3: Is it button top or flat top?
A: Flat top, suitable for battery packs and compatible devices.

Q4: What’s the maximum pulse discharge rate?
A: Up to 45A for short bursts (max 5 seconds).

• Free Shipping on all Australian orders over $70.
• $5.95 flat shipping fee for Australian orders under $70.
• Order before 2pm and we promise to dispatch on Same Day !
• Delivery Time :

1. Syd, Mel, Bri, Adl - 1-2 Days
2. Rest of Australia - 2-5 Days

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• Return it for a full refund.
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If you change your mind about a product you purchased, you can return it within 90 days for a flat return shipping fee of $6.95.