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Hero image 0 of Samsung 4000mAh 40T 30A Rechargeable Flat Top Battery Replacement for 21700 Batteries (2 Pack), 0 of 1
Samsung 4000mAh 40T 30A Rechargeable Flat Top Battery Replacement for 21700 Batteries (2 Pack)
Key item features
- Style: Flat Top
- Chemistry: INR
- Size: 21700
- Nominal capacity: 4000mAh (Max)
- Max Continuous Rated Discharge: 30A
- Dimensions: 70.30 mm (Max) x 21.20 mm (Max)
- Weight: 70.0g (Max)
- Discharge Cut-off Voltage: 2.50V
- Nominal voltage: 3.60V
- Full Charge Voltage: 4.2V ± 0.05V
- Protected: No, Unprotected
- What you will get:
- 2x INR 21700mAh 40T Flat Top Batteries
Specs
- RechargeableY
- Volts3.60 V
- Battery capacity4000 mAh
- Has written warrantyNo
- Piece count2
- ManufacturerSAMSUNG
Current price is USD$23.98
Price when purchased online
Out of stock
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About this item
Product details
One of the great performing 21700 size batteries, the 21700 40T model is a great cell which offers high overall power, while providing a large 4000mAh of capacity.
- Style: Flat Top
- Chemistry: INR
- Size: 21700
- Nominal capacity: 4000mAh (Max)
- Max Continuous Rated Discharge: 30A
- Dimensions: 70.30 mm (Max) x 21.20 mm (Max)
- Weight: 70.0g (Max)
- Discharge Cut-off Voltage: 2.50V
- Nominal voltage: 3.60V
- Full Charge Voltage: 4.2V ± 0.05V
- Protected: No, Unprotected
- What you will get:
- 2x INR 21700mAh 40T Flat Top Batteries
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it. Â
Specifications
Rechargeable
Y
Volts
3.60 V
Battery capacity
4000 mAh
Brand
M&A BD Electronics
Warranty
Warranty information
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
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Showing 1-3 of 3 reviews
Mar 5, 2025
Terri
Top Reviewer
4 out of 5 stars review
Verified Purchase
Batteries
I didn't receive 3 like the picture. They last ok. I figured they would last more than a day but they don't.
Helpful?5LBM8G0SIF9G2833770620
Aug 6, 2025
Jake
3 out of 5 stars review
Verified Purchase
you pay for what you get...labeled and printed on the battery 4k mah...for 3k at best. good price even for a 3km mah tho. these might be an older batch. doesn't hold charge without use really well. went from 99 to 89 in two days sitting on a shelf in a case. have a few 3k mah 18650s that will stay in the 90s for 3 days with no use. this is a quick fix but you will something else soon.
Helpful?5LBM8G0SIF9G2833770620
Jun 2, 2024
Keith
2 out of 5 stars review
Verified Purchase
Snail mail
Samsung speaks for itself they are among the best batteries in the world. However, shipping has been very slow. Took them 3 days to initially ship. Then delays. I ordered another product, from a private company in California 2 days after this order and received it in less than 48 hours. Still waiting for my batteries, should have used Amazon.
Helpful?5LBM8G0SIF9G2833770620
