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Price comparison

Price data powered by pricesAPI.io

Last updated at 12/05/2026 18:46:59

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Alibaba.com

$4.40

Inr21700 40t 3.6v 4000mah 21×70mm Li-ion Battery For E-bikes & Power Tools Oem

Delivery $183.46

Alibaba.com

$13.85

Wholesale 21700 battery 21700 5000mah 21700 lithium battery 21700 cells 21700 electric bicycle battery 21700 50S 21700 40T 21700 high discharge 21700

Delivery $27.69

AliExpress.com - AliExpress-226247430

$9.69

4000mah 3.7V 70g 30A 40T 21700 Li-ion Rechargeable Battery , High Discharge/High Capacity 3.7V 21700

Free delivery

AliExpress.com - AliExpress-226247430

$15.09

21700 Rechargeable Li-ion Battery 3.7V 4000mAh 40T 30A High Discharge Cell With Welding Wire For

Free delivery

AliExpress.com - AliExpress-226247430

$15.09

Original Battery 21700 4.0Ah INR21700-40T 4000mAh 30A 40T 3.7V High Discharge/large Capacity

Free delivery

AliExpress.com - AliExpress-226247430

$21.59

Original Battery 21700 4.0Ah INR21700-40T 4000mAh 30A 40T 3.7V High Discharge/large Capacity

Free delivery

AliExpress.com - AliExpress-226247430

$23.79

Original Foot capacity 4000mAh 3.7V 21700 Battery 30A High Discharge/Large Capacity INR 21700-40T

Free delivery

Kogan.com

$13.90

40T 21700 4000mAh 35A Rechargeable Li-ion Battery

Delivery $5.98

Kogan.com

$14.95

21700 Li-ion batteries 40T 21700 4000mAh 35A Battery

Delivery $5.98

Dick Smith AU

$13.90

40T 21700 4000mAh 35A Rechargeable Li-ion Battery

Delivery $5.98

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

25 September 2024

originally posted on temu.com

Received product in good condition, yet to test the battery.

Awesome original batteries
25 March 2022Guest

originally posted on ausbatteries.com

Awesome original batteries

Excellent product. Shipping was very
22 September 2022Michael H.

originally posted on ausbatteries.com

Excellent product. Shipping was very fast. Got it as a spare for my 21700 torch and now have it charged ready to do its job. Overall excellent service many thanks.

Specification

Voltage3.6V
Nominal capacity4000mAh
Discharge35A

Price comparison

Updated about 1 month ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Alibaba.com

$4.40

Out of stock

Inr21700 40t 3.6v 4000mah 21×70mm Li-ion Battery For E-bikes & Power Tools Oem

Delivery $183.46

Alibaba.com

$13.85

Wholesale 21700 battery 21700 5000mah 21700 lithium battery 21700 cells 21700 electric bicycle battery 21700 50S 21700 40T 21700 high discharge 21700

Delivery $27.69

AliExpress.com - AliExpress-226247430

$9.69

4000mah 3.7V 70g 30A 40T 21700 Li-ion Rechargeable Battery , High Discharge/High Capacity 3.7V 21700

Free delivery

AliExpress.com - AliExpress-226247430

$15.09

21700 Rechargeable Li-ion Battery 3.7V 4000mAh 40T 30A High Discharge Cell With Welding Wire For

Free delivery

AliExpress.com - AliExpress-226247430

$15.09

Original Battery 21700 4.0Ah INR21700-40T 4000mAh 30A 40T 3.7V High Discharge/large Capacity

Free delivery

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

25 September 2024

Received product in good condition, yet to test the battery.

originally posted on temu.com
Awesome original batteries
25 March 2022

Awesome original batteries

Guest originally posted on ausbatteries.com
Excellent product. Shipping was very
22 September 2022

Excellent product. Shipping was very fast. Got it as a spare for my 21700 torch and now have it charged ready to do its job. Overall excellent service many thanks.

Michael H. originally posted on ausbatteries.com
Lithium battery review
20 March 2024

Purchased 2 x Samsung 40T 21700 and repaired my defective Procore 18v 8Ah battery. My battery was near new and two cells failed, but now is repaired and as good as new.

Tony D. originally posted on ausbatteries.com
Works very well, would purchase
10 May 2022

Works very well, would purchase again

Guest originally posted on ausbatteries.com

Specification

Voltage3.6V
Nominal capacity4000mAh
Discharge35A

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40T 21700 4000mAh 35A Li-ion Battery - AfterPay & zipPay Available
40T 21700 4000mAh 35A Li-ion Battery - AfterPay & zipPay Available
40T 21700 4000mAh 35A Li-ion Battery - AfterPay & zipPay Available

40T 21700 4000mAh 35A Li-ion Battery - AfterPay & zipPay Available

40T 21700 4000mAh 35A Li-ion Battery - AfterPay & zipPay Available

$4.40

(6 reviews)

The INR21700-40T provides excellent power output and long-lasting performance due to its advanced lithium-ion chemistry and high energy density. Its cylindrical shape with a diameter of 21mm and a length of 70mm makes it compatible with various devices requiring this form factor. 21700 Li-ion batteries are high capacity and high discharge batteries commonly used in devices such as flashlights, electronics, laptops, vaping and even some electric vehicles use 21700 Batteries. Model: Samsung 40T Voltage: 3.6V Rechargeable: Yes Nominal capacity: 4000mAh Discharge: 35A Diameter: 21.1mm Height: 70.4mm IEC: 21700 Chemistry: Li-Ion Commonly Known As: * 40T 21700, Samsung 40T 21700The INR21700-40T provides excellent power output and long-lasting performance due to its advanced lithium-ion chemistry and high energy density. Its cylindrical shape with a diameter of 21mm and a length of 70mm makes it compatible with various devices requiring this form factor. 21700 Li-ion batteries are high capacity and high discharge batteries commonly used in devices such as flashlights, electronics, laptops, vaping and even some electric vehicles use 21700 Batteries. Model: Samsung 40T Voltage: 3.6V Rechargeable: Yes Nominal capacity: 4000mAh Discharge: 35A Diameter: 21.1mm Height: 70.4mm IEC: 21700 Chemistry: Li-Ion Commonly Known As: * 40T 21700, Samsung 40T 21700 |

The INR21700-40T provides excellent power output and long-lasting performance due to its advanced lithium-ion chemistry and high energy density. Its cylindrical shape with a diameter of 21mm and a length of 70mm makes it compatible with various devices requiring this form factor. 21700 Li-ion batteries are high capacity and high discharge batteries commonly used in devices such as flashlights, electronics, laptops, vaping and even some electric vehicles use 21700 Batteries. Model: Samsung 40T Voltage: 3.6V Rechargeable: Yes Nominal capacity: 4000mAh Discharge: 35A Diameter: 21.1mm Height: 70.4mm IEC: 21700 Chemistry: Li-Ion Commonly Known As: * 40T 21700, Samsung 40T 21700The INR21700-40T provides excellent power output and long-lasting performance due to its advanced lithium-ion chemistry and high energy density. Its cylindrical shape with a diameter of 21mm and a length of 70mm makes it compatible with various devices requiring this form factor. 21700 Li-ion batteries are high capacity and high discharge batteries commonly used in devices such as flashlights, electronics, laptops, vaping and even some electric vehicles use 21700 Batteries. Model: Samsung 40T Voltage: 3.6V Rechargeable: Yes Nominal capacity: 4000mAh Discharge: 35A Diameter: 21.1mm Height: 70.4mm IEC: 21700 Chemistry: Li-Ion Commonly Known As: * 40T 21700, Samsung 40T 21700 |

(6 reviews)

The INR21700-40T provides excellent power output and long-lasting performance due to its advanced lithium-ion chemistry and high energy density. Its cylindrical shape with a diameter of 21mm and a length of 70mm makes it compatible with various devices requiring this form factor. 21700 Li-ion batteries are high capacity and high discharge batteries commonly used in devices such as flashlights, electronics, laptops, vaping and even some electric vehicles use 21700 Batteries. Model: Samsung 40T Voltage: 3.6V Rechargeable: Yes Nominal capacity: 4000mAh Discharge: 35A Diameter: 21.1mm Height: 70.4mm IEC: 21700 Chemistry: Li-Ion Commonly Known As: * 40T 21700, Samsung 40T 21700The INR21700-40T provides excellent power output and long-lasting performance due to its advanced lithium-ion chemistry and high energy density. Its cylindrical shape with a diameter of 21mm and a length of 70mm makes it compatible with various devices requiring this form factor. 21700 Li-ion batteries are high capacity and high discharge batteries commonly used in devices such as flashlights, electronics, laptops, vaping and even some electric vehicles use 21700 Batteries. Model: Samsung 40T Voltage: 3.6V Rechargeable: Yes Nominal capacity: 4000mAh Discharge: 35A Diameter: 21.1mm Height: 70.4mm IEC: 21700 Chemistry: Li-Ion Commonly Known As: * 40T 21700, Samsung 40T 21700 |

The INR21700-40T provides excellent power output and long-lasting performance due to its advanced lithium-ion chemistry and high energy density. Its cylindrical shape with a diameter of 21mm and a length of 70mm makes it compatible with various devices requiring this form factor. 21700 Li-ion batteries are high capacity and high discharge batteries commonly used in devices such as flashlights, electronics, laptops, vaping and even some electric vehicles use 21700 Batteries. Model: Samsung 40T Voltage: 3.6V Rechargeable: Yes Nominal capacity: 4000mAh Discharge: 35A Diameter: 21.1mm Height: 70.4mm IEC: 21700 Chemistry: Li-Ion Commonly Known As: * 40T 21700, Samsung 40T 21700The INR21700-40T provides excellent power output and long-lasting performance due to its advanced lithium-ion chemistry and high energy density. Its cylindrical shape with a diameter of 21mm and a length of 70mm makes it compatible with various devices requiring this form factor. 21700 Li-ion batteries are high capacity and high discharge batteries commonly used in devices such as flashlights, electronics, laptops, vaping and even some electric vehicles use 21700 Batteries. Model: Samsung 40T Voltage: 3.6V Rechargeable: Yes Nominal capacity: 4000mAh Discharge: 35A Diameter: 21.1mm Height: 70.4mm IEC: 21700 Chemistry: Li-Ion Commonly Known As: * 40T 21700, Samsung 40T 21700 |

$4.40 - $23.79

in 22 offers

The lowest price for 40T 21700 4000mAh 35A Li-ion Battery - AfterPay & zipPay Available right now is $4.40 at Alibaba.com, compared across 10 retailers.

The all-time low was $4.05 on 12 Mar 2026 — today's price is 9% above the lowest ever. That's a little above the best price we've seen.

Prices last updated 12 May 2026.