- Lithium batteries are regulated dangerous goods requiring special logistics. Shipping is available to the US, Canada, Australia and most European countries only. For buyers from other countries, please inquire before placing an order.
2. For certain countries, buyers are required to handle customs clearance at the airport or port by themselves. Please ensure you are capable of doing so, and if you have any queries, feel free to contact me before making the purchase.
3. For batteries purchased in bulk, I ensure the time interval between the production date and the shipping date is no more than 180 days; for non-bulk battery purchases, the interval is capped at 360 days – this is, of course, the worst-case scenario.
Action for 4pcs battery
Manufacturer Samsung SDI
Model INR21700-50S (50S)
Size 21700
Positive Terminal Flat Top
Nominal Capacity 5000mAh
Continuous Discharge Rating (Max) 25A (45A with 80°C cutoff)
Nominal Voltage 3.6V
Maximum Voltage 4.2V
Discharge Cut-off Voltage 2.5V
Protected No (Unprotected)
Rechargeable Yes
Approx. Dimensions 21.1mm x 70.7mm
Approx. Weight 70.09g
| No. | Item | Specification |
| 3.1 | Standard discharge capacity | Typ. 5,000mAh -Charge: 0.5C(2.5A), 4.20V, 0.05C(250mA) cut-off @ RT -Discharge: 0.2C(1A), 2.5V cut-off @ RT *1C=5000mA |
| 3.2 | Rated discharge capacity | Min. 4,800mAh -Charge: 1.2C(6A), 4.20V, 0.02C(100mA) cut-off @ RT -Discharge: 10A, 2.5V cut-off @ RT |
| 3.3 | Nominal voltage | 3.6V |
| 3.4 | Standard charge | CCCV, 2.5A, 4.20V, 250mA cut-off |
| 3.5 | Rated charge | CCCV, 6A, 4.20V, 100mA cut-off |
| 3.6 | Charging time | Standard charge: 150min / 250mA cut-off @ RT; Rated charge: 100min / 100mA cut-off @ RT |
| 3.7 | Max. continuous discharge | 25A (Without temperature cut); 45A (With 80℃temperature cut) |
| 3.8 | Max. charge current | 10A (step charge); 6A (continuous charge) |
| 3.9 | Discharge cut-off voltage | 2.5V |
| 3.1 | Cycle life | 250 cycles ≥940mAh@ 25A; 100 cycles ≥940mAh@45A |
| 3.11 | Retention characteristics | ≥320mAh after 60℃30 days storage |
| 3.12 | Cell weight | Max 72.0g |
| 3.13 | Cell dimension | Φ21.25mm x 70.62mm Max |
| 3.14 | Operating Temp (Ambient) | Charge: 0~60℃ Discharge: -20~60℃ |
| 3.15 | Operating Temp (Surface) | Charge: 0~60℃ Discharge: -20~80℃ |
| 3.16 | Safety Cert Temp | Charge: -10~60℃ |
| 3.17 | Storage Life (90% Capacity) | 0~25℃ 1Y; 0~45℃ 3M; 0~60℃ 1M |
