18650 cells use an approximately 18 mm by 65 mm cylindrical format. For B2B battery-pack sourcing, select the exact manufacturer model and its published specification rather than treating every 18650 cell as interchangeable.
How to compare 18650 battery cell models
Start with the required pack voltage, series-parallel configuration, usable runtime, continuous and peak load, enclosure space, operating temperature, annual quantity and delivery country. Capacity alone does not define suitability. The pack designer must validate electrical, thermal and mechanical performance for the finished system.
18650 cell comparison table
| Published model | Nominal capacity | B2B selection note |
|---|---|---|
| Samsung INR18650-25RM/T | 2500mAh | Confirm the current manufacturer data sheet and pack-load requirements. |
| Samsung INR18650-30Q | 3000mAh | Evaluate against the required application, configuration and validation plan. |
| Samsung INR18650-33G | 3300mAh | Confirm the exact model revision and technical-file requirements before production. |
| Samsung INR18650-35ET | 3500mAh | Review dimensions, electrical limits and the finished-pack design. |
| EVE INR18650/25P | 2500mAh | Confirm matching documents and destination-country requirements. |
| EVE INR18650/35V | 3500mAh | Use the published product record as a starting point, then confirm model-specific details. |
| DMEGC INR18650-20P | 2000mAh | Assess against your runtime, load and pack-space criteria. |
| DMEGC INR18650-30P | 3000mAh | Confirm model availability, packaging and required files for the specific inquiry. |
See the full 18650 cell catalog for current model pages, or compare the wider cylindrical Li-ion cell range.
Which 18650 cell is suitable for a B2B battery-pack project?
The suitable 18650 cell is the specific manufacturer model that matches the project’s electrical, thermal, mechanical and documentation requirements. A nominal capacity figure alone is not sufficient; the finished pack must be validated by the pack designer.
What to include in an 18650 wholesale inquiry
For a usable 18650 wholesale quotation, provide the exact model or candidate models, application, series-parallel configuration, expected quantity, destination country and required files. Sufeng confirms availability, packaging, documents and delivery route against the exact model and order details. Submit an EU B2B cell wholesale inquiry when these details are ready.
Model verification and sources
Model names and nominal capacities in this guide are taken from the linked product records. Use the exact manufacturer data sheet and completed pack validation before production. For broader procurement support, see the LiFePO4 and 21700 battery cell wholesale page.
Prepared by: Sufeng New Energy technical team. Last reviewed: August 2026.
Source basis: linked model records and current manufacturer specification sheets. Confirm the exact data sheet and complete pack validation before production.