Li-ionLG · 21700
INR21700-M58T
- 5,650mAh
- 3.59V
- 20.3Wh
- 2.2C
Price on request
Ø21.45 × 70.75mm · 72g
Ships from ChinaLi-ionGenuine
BAK N21700CK-55E 5,500mAh 3.6V Li-ion · Cylindrical 21700
Sold by Litio Store SRL · Selling batteries since 2015 · litio.store
- Nominal capacity
- 5,500mAh
- Nominal voltage
- 3.6V
- Energy per cell
- 19.8Wh
- Cycle life
- 800
Ships from China
We import the cells into the EU ourselves. The delivery time is stated in your quote; by sea it is usually 3–4 months.
Sold by Litio Store SRL
Italian company selling lithium batteries since 2015. VAT IT03894170541.
Visit litio.store ↗100% genuine cells
This is an original BAK cell. We do not sell relabelled, rewrapped or counterfeit cells. LiFePO4 Cells is run by Litio Store SRL, an Italian company that has been selling lithium batteries since 2015. If anything is wrong, contact us and we will sort it out.
Technical specifications
| Manufacturer | BAK |
|---|---|
| Model | N21700CK-55E |
| Chemistry | lithium-ion (NMC/NCA) |
| Format | Cylindrical |
| Size | 21700 |
| Nominal capacity | 5,500mAh |
| Nominal voltage | 3.6V |
| Energy per cell | 19.8Wh |
| Charge voltage | 4.2V |
| Discharge cut-off voltage | 2.5V |
| Standard charge current | 2.675A (0.5C) |
| Max charge current | 5.35A (1C, not for cycle life) |
| Max continuous discharge | 10.7A (2C, not for cycle life) |
| Internal resistance (AC 1kHz) | ≤25mΩ (AC 1kHz) |
| Cycle life | 800 cycles (≥80% at 801st cycle, 0.5C chg; 1C dis to 2.75V, 25°C) |
| Dimensions | Ø21.45 × 70.75mm |
| Weight | 72g |
| Gravimetric energy density | 275Wh/kg |
| Charge temperature | 0~45°C |
| Discharge temperature | -20~60°C |
Specifications as stated by the manufacturer. Values may vary slightly between production batches; the datasheet sent with your quote is the reference.
Downloads
No documents have been published for this cell yet. The manufacturer's datasheet is sent with your quote.
Overview
The BAK N21700CK-55E is a genuine Li-ion cell with a nominal capacity of 5.5Ah at 3.6V, giving 19.8Wh of energy per cell.
About this chemistry
Lithium-ion cells with nickel-based cathodes (NMC, NCA and similar) have the highest energy density of all the chemistries we offer. Cylindrical 18650 and 21700 cells are used in e-bike, e-scooter, power tool and portable batteries. Nominal voltage is 3.6–3.7V per cell and the charge voltage is usually 4.2V. Choose high-capacity cells for range, or high-drain cells for power.
About this format
Cylindrical cells have a steel can and are named after their size: the first two digits give the diameter and the following digits the length in millimetres (for example, 18650 = 18mm × 65mm). They are robust and consistent, and well suited to packs built with spot-welded nickel strip or cell holders.
Typical applications
E-bikes and e-scooters, power tools, portable power stations, torches, drones, robotics, and custom packs where weight and size are critical.
- 100% Italian companyLitio Store SRL, Sigillo (Perugia), Italy
- Genuine cells onlyOriginal manufacturer cells, never relabelled
- No customs charges on deliveryOne all-inclusive price for EU customers
- A company that gets back to youBefore and after your order