Cylindrical lithium cell sourcing for industrial 18650 / 21700 Li-ion and 32700 LiFePO4 supply—capacity, discharge class, IR matching, batch traceability, and cell-level quality control.
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Product options
Products are shown in one catalog grid, with product type and keyword filters before detail-page review of BMS, enclosure, certification, and duty-cycle requirements.
18650 cylindrical lithium cell supply for OEM buyers who need mature sourcing, capacity and discharge class shortlists, IR matching, batch traceability, and flexible series-parallel building blocks.
Key specs
3.6V / 3.7V nominal / About 2.0-3.5Ah typical; 4.0Ah class by project / About 5-40A typical; higher current by project / 18650 Li-ion / NMC by project; LFP option review
21700 cylindrical lithium cell supply for OEM buyers who need higher cell capacity, fewer parallel groups, energy / power / high-rate class shortlists, IR matching, and batch traceability within the available equipment space.
Key specs
3.6V / 3.7V nominal / About 3.0-5.5Ah typical; 6.5Ah class by project / About 10-50A typical; higher current by project / 21700 Li-ion / NMC by project
32700 LiFePO4 cylindrical cell supply for safer long-life OEM modules and packs that need 3.2V building blocks, matching, cycle-life planning, and batch traceability—not maximum Li-ion energy density.
Key specs
3.2V nominal / About 5.5-6.5Ah planning / About 1C-3C continuous class / 32700 LiFePO4
Category notes
18650, 21700, and 32700 cylindrical lithium cells with anonymous capacity and discharge class bands for OEM cell sourcing, matching, and traceability.
Cylindrical cell formats
Compare size, chemistry, and discharge class first: 18650 / 21700 are Li-ion cylindrical cells; 32700 is LiFePO4. Then open the matching detail page for anonymous capability bands, datasheet reading notes, and matching boundaries.
Mature compact Li-ion route; the detail page provides energy / power / high-rate planning bands around 2.0–3.5Ah and separates continuous current from 80°C cutoff.
Higher-capacity Li-ion cylindrical route; the detail page provides about 3.0–5.5Ah energy / power / high-rate bands and continuous-vs-pulse / thermal-cutoff caution.
Long-life LiFePO4 route; the detail page provides about 5.5–6.5Ah / 1C–3C planning bands, with finished packs on the custom 32700 page.
Cell manufacturing and quality
Cylindrical cell sourcing and matching stay on cell-level consistency, grading, datasheet-condition reading, cycle-life review, and batch traceability rather than pack engineering.
Screen by voltage, 1 kHz ACIR, and capacity windows to reduce downstream module or PACK matching risk.
Peak current often assumes 80°C cutoff or a short pulse; compact packs without cooling may need derating. ACIR is for matching; pack heat follows DCIR.
Review life boundaries by chemistry, charge rate, discharge cutoff, and operating temperature, especially for 32700 LFP routes.
Keep incoming, sorting, and shipment records for industrial cylindrical cell quality review.
Need packs, modules, or assembly?
After the cylindrical cell format and matching boundary are clear, open the matching entry to continue with 18650 / 21700 / 32700 pack design, industrial module delivery, or approved-spec assembly.
Other cell formats
If the project fits thin, shaped, or high-rate polymer routes better, continue on the pouch / polymer cells category.
View pouch / polymer cellsCategory key specs
This section keeps the category's key product capabilities so buyers can judge voltage, capacity, discharge, structure, BMS, and certification range first.
Sourcing language
Cylindrical cell RFQs should state format, capacity, continuous vs peak current, charge window, IR matching, batch traceability, and cell-level quality needs so supply and matching boundaries are clear in one pass.
For cell supply, industrial matching, and 32700 LiFePO4 manufacturing review.
Use these terms to confirm diameter, height, capacity band, and sourcing maturity first.
Buying guide & FAQ
Use this page for 18650 / 21700 Li-ion and 32700 LiFePO4 cell supply, matching, and cell-level quality. Open the 18650 vs 21700 vs 32700 guide for format selection method. Open a cell detail page for one diameter. Open custom cylindrical PACK or Custom OEM when the finished pack is still undefined.
Request cells when the buyer already controls series-parallel layout, welding or holders, BMS, enclosure, connector, and validation. If those boundaries are undefined, start with Custom OEM pack design instead of cell-only sourcing.
No. This cylindrical cell sourcing page covers cell supply, format overview, matching, and cell-level quality. Pack design goes to Custom OEM; approved-spec builds go to assembly service; modular industrial delivery goes to the industrial lithium battery module page.
Treat maximum current as conditional: many 18650 / 21700 figures assume an 80°C cutoff or a short pulse, not unlimited continuous current in a compact pack. 1 kHz ACIR is for incoming matching; pack heating follows DCIR. Energy-class cells usually stay near 0.2C-0.5C charge. Open the 18650 or 21700 detail page for class bands; 32700 LiFePO4 stays on the 1C-3C planning band.
Global delivery and project documentation
Staricell plans cell supply, pack engineering, BMS integration, test records, and shipment documents around each shipping country, application duty cycle, certification target, and production schedule.
Cell supply, pack engineering, BMS integration, production testing, and export documents are planned around each buyer's shipping country, application, and volume schedule.
Project files can cover UN38.3, MSDS / SDS, shipment labels, test summaries, and documentation paths for CE, IEC, UL, RoHS / REACH, and other requirements.
Operating temperature, continuous / peak current, enclosure protection, connectors, chargers, communication interfaces, and field-service needs are reviewed before mass production.
Cell batch data, matching records, BMS settings, inspection results, and aging summaries can be aligned before sampling or pilot production.
Project quote
Share voltage, capacity, application, quantity, target market, enclosure needs, and certification targets. Our team will map the pack architecture and quote path.
