Quick answer: Before requesting a bulk quote for Samsung INR21700-50S cells, confirm the exact model, the test conditions behind each specification, the batch records you need, and the shipment route to your destination. A cell’s capacity rating alone is not enough to approve it for a battery pack.
This guide is for battery-pack builders, distributors and project buyers sourcing 21700 cells for a defined B2B application. It is a procurement checklist—not a promise of current stock, price or delivery time.
Samsung INR21700-50S: key specification context
| Item | Specification reference | What a buyer should note |
|---|---|---|
| Model | INR21700-50S | Check the complete model marking on the cell and the batch documentation. |
| Nominal voltage | 3.6 V | Use the manufacturer’s value in pack energy calculations. |
| Capacity | 5,000 mAh typical; 4,800 mAh minimum under the rated test condition | The test protocol matters; do not compare capacity figures without comparing conditions. |
| Continuous discharge | 25 A without a temperature cut; the document also lists 45 A with an 80°C surface-temperature cut | The conditional 45 A figure is not a universal design target. Pack thermal controls and project limits still govern. |
These values are summarized from a publicly available copy of the Samsung SDI INR21700-50S product specification. Always confirm the applicable specification revision and the documentation for the batch being quoted.
1. Match the cell to the pack—not just the headline number
Give your engineering team the actual continuous current, short-duration peaks, voltage window, ambient temperature and cooling arrangement. Then check series/parallel configuration, BMS limits, interconnects and enclosure heat rejection. The individual-cell rating does not automatically become the safe current rating of a finished pack.
For power tools, mobility or UAV projects, provide a representative load profile. A simple maximum-current number without pulse duration, duty cycle or temperature limits is not enough for a technical match.
2. Define what batch evidence you need
Before ordering, state whether you need carton and cell photographs, model and batch identifiers, a manufacturer datasheet, sample evaluation, or order-specific measurement records. Ask which records apply to the offered batch and how they map to the shipping cartons. Do not assume that a photo of a label or one sample reading proves the condition of every cell.
See our Samsung INR21700-50S product details and the Hong Kong shipment-preparation record. The photograph records a specific preparation occasion; it is not a live inventory count.
3. Confirm quantity, destination and delivery route
For a useful B2B quotation, send the exact model, required quantity, application, destination country, document requirements and preferred shipment route. If considering goods held in the Poland warehouse, confirm current model availability and the terms for the final destination; warehouse customs clearance in Poland does not by itself settle import treatment in another country. Inspection or collection in Poland must be arranged by appointment. China dispatch is also accepted; freight, customs, taxes and documents are confirmed for the particular order.
Buyer checklist
- Is the required model exactly INR21700-50S?
- Are capacity and discharge values tied to the same test conditions as the manufacturer’s specification?
- Does the pack design account for continuous load, pulses, heat, BMS and interconnect limits?
- Which batch records and transport documents are required?
- What quantity and final destination should the quotation cover?
Share those details through our B2B inquiry page to request technical matching and order-specific availability. We confirm commercial and shipping terms individually.
Prepared by Sufeng New Energy. Technical values above are reference values from the linked product specification; the specification applicable to a quoted batch should be checked before purchase.