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21700 Cylindrical Lithium Cells

21700 BATTERY CELLS (BULK & HIGH-CAPACITY OEM SUPPLY)

21700 cells deliver higher capacity and strong power capability in a modern cylindrical format. Use them for EV, e-bike, energy storage, robotics, and other high-demand battery pack builds. Availability may vary by model — bulk orders and special orders are supported.

Shop Cylindrical Cell Inventory Request a Bulk Quote Search 21700 Cells
Authentic sourcing • Optional testing • Special order by air or sea • US-based support
Email: Sales@rpe-na.com

Why choose 21700 cells?

1) Higher energy density
  • More capacity per cell vs many 18650 options.
  • Improves pack runtime without increasing parallel count as much.
2) Strong power options
  • Many models are designed for high discharge (power builds).
  • Great fit for performance e-bike, scooters, and robotics.
3) Modern OEM format
  • Commonly used in EV and energy storage development.
  • Great balance of size, thermal behavior, and pack efficiency.

Not sure what the numbers mean? Use the sizing guide: 18650 / 21700 / 26650 explained.

Battery testing (optional, recommended for bulk)

For high-volume orders, testing helps verify consistency before cells go into production. Testing options depend on your chosen model and your performance targets.

Capacity checks
  • Sample-based discharge testing (Ah / Wh)
  • Consistency checks across a lot
  • Report summary available upon request
IR / resistance screening
  • Internal resistance sampling to catch outliers
  • Helps improve pack balance + current sharing
  • Useful for high-power builds
Build guidance
  • Recommend energy vs power cells based on amps
  • Packaging guidance for safe handling and shipping
  • Project-based sourcing support
Request Testing + Quote Bulk Order Page

Bulk quote (fast)

For the fastest quote, email your cell requirements and we’ll confirm availability, tier pricing, and the best shipping path.

Send these details Quantity • Target model/brand • Required discharge (A) • Capacity target (Ah/mAh) • Delivery ZIP • Timeline • Air or Sea
Typical transport Air: ~10 days (best for urgent)
Sea: ~40 days (best for large volume)
Email for Bulk Quote Search “21700” on Site

FAQ

Stock varies by model and brand. If a specific 21700 cell is sold out, bulk and special orders are available. Email Sales@rpe-na.com with your target model and quantity to confirm availability.
Yes. Air is typically ~10 days and is best for urgent projects. Sea is typically ~40 days and is best for large volume. Pricing depends on the cell model, quantity, and destination.
Yes. Testing options can include capacity checks (Ah/Wh), internal resistance screening, and lot consistency sampling depending on project needs and the cell model.
21700 refers to a cylindrical cell size format. For a simple comparison versus 18650 and 26650, read the guide here: 18650 / 21700 / 26650 explained.

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