Samsung INR21700-40T
In brief: 21700 Li-ion battery cell. 4000mAh capacity. 35A continuous discharge. From $5 across 2 sellers.
Specs verified Jul 15, 2026
Where to Find
Prices tracked across 3 sellersPrice History
Price History
Price changes tracked by the crawler
Current best price $3.95. Over the past 90 days: low $3.95, high $5.99, average $5.01 — down 21% vs average.
- 18650 Battery
- 18650 Battery Store
- IMR Batteries
All Records
73 price records in this period
| Date | Price | Shipping | Total | Change | Coupon | Rating | Sales | In Stock | Status |
|---|---|---|---|---|---|---|---|---|---|
18650 Battery(30 records) | |||||||||
| Jul 9, 202609:00 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jul 5, 202609:00 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jul 1, 202609:00 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 27, 202609:00 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 23, 202609:00 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 21, 202609:00 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 19, 202609:00 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 17, 202609:00 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 15, 202609:00 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 13, 202609:00 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 12, 202609:00 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 12, 202601:59 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 11, 202609:01 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 9, 202609:25 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 7, 202609:25 AM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 5, 202611:57 AM | $4.99 | — | $4.99 | $1.00 | — | — | — | Yes | active |
| Jun 3, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| Jun 2, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 31, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 29, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 27, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 25, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 23, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 21, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 19, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 18, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 16, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 14, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 12, 202609:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| Apr 21, 202609:00 AM | $5.99 | — | $5.99 | Initial | — | — | — | Yes | active |
18650 Battery Store(27 records) | |||||||||
| Jul 15, 202612:36 PM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jul 9, 202609:01 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jul 7, 202609:01 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jul 5, 202609:01 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jul 1, 202609:01 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jun 29, 202609:01 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jun 27, 202609:01 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jun 23, 202609:01 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jun 21, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jun 18, 202609:25 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jun 13, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jun 9, 202604:00 PM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| Jun 7, 202603:57 PM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| Jun 3, 202610:50 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | No | active |
| Jun 2, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| May 31, 202610:37 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| May 29, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| May 27, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| May 25, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| May 23, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| May 21, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| May 19, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| May 18, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| May 16, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| May 14, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| May 12, 202609:00 AM | $3.95 | — | $3.95 | $0.00 | — | — | — | Yes | active |
| Apr 21, 202609:00 AM | $3.95 | — | $3.95 | Initial | — | — | — | Yes | active |
IMR Batteries(16 records) | |||||||||
| Jul 5, 202605:49 PM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 27, 202604:49 PM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 19, 202604:04 PM | $4.99 | — | $4.99 | $0.00 | — | — | — | Yes | active |
| Jun 10, 202609:08 AM | $4.99 | — | $4.99 | $1.00 | — | — | — | Yes | active |
| Jun 2, 202610:07 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 29, 202610:02 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 27, 202610:00 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 25, 202601:35 PM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 23, 202610:02 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 21, 202609:03 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 19, 202609:04 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 18, 202609:04 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 16, 202609:03 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 14, 202609:03 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| May 12, 202609:03 AM | $5.99 | — | $5.99 | $0.00 | — | — | — | Yes | active |
| Apr 21, 202609:05 AM | $5.99 | — | $5.99 | Initial | — | — | — | Yes | active |
Reviews
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Specifications
Cell Specs
- Form Factor
- 21700
- Chemistry
- Li-ion
- Capacity
- 4000mAh
- Continuous Discharge
- 35.00A
Physical
- Weight
- 67 g
- Dimensions (L×W×H)
- 70mm × 21mm × 21mm
