INR21700‑6500D 21700 Lithium‑ion Cell | 6500mAh 3.5V NCM Cylindrical Rechargeable Battery

Product Overview

Our INR21700‑6500D 21700 6500mAh lithium ion cell manufactured by Great Power.

This rechargeable cell delivers 6500mAh rated capacity with stable 3.5V nominal voltage. It is designed for custom battery pack assembly, energy storage and mid‑high drain industrial devices.

Large inventory is available right now. We offer competitive wholesale prices for bulk orders. Reach out to us for your best quotation.

Core Electrical Performance

• Rated capacity: 6500mAh
• Nominal voltage: 3.5V
• Max charge voltage: 4.20V
• Discharge cut‑off voltage: 2.5V
• AC internal resistance: ≤25 mΩ (measured at 30% SOC, 1 kHz, no PTC)
• Cell weight: ≤74 g

Charge current

• Recommended charge current: 3000 mA
• Maximum charge current: 4500 mA
• ❗Do NOT charge below ‑5 °C

Discharge current

• Recommended continuous discharge: 7500 mA
• Maximum continuous discharge: 12500 mA (12.5A)
• Good capacity retention under high‑current load: ≥85% capacity at 12.5A discharge.

Physical Dimensions

• Diameter: ≤21.75 mm
• Height: ≤71.00 mm
• Flat cap design with CID safety device, PTC‑free
• Equipped with PET sleeve and white insulator pad

Operating & Storage Conditions

Wide temperature working window supports diverse real‑world projects.

Charge temperature range: 0 °C ~ 45 °C Discharge temperature range: ‑20 °C ~ 65 °C

For long‑term storage: Store cells at 25%‑50% SOC. ‑20 °C ~ 25 °C storage valid up to 12 months. Re‑charge every 6 months to avoid over‑discharge.

Safety & Compliance

Each cell passes strict lab tests following IEC62133‑2, UN38.3, UL1642, GB31241.

Passed tests include thermal cycle, drop test, hot‑box, seawater immersion, overcharge, forced discharge and external short‑circuit. Test criteria: no fire, no explosion.

Compliant with RoHS2.0, REACH and EU battery directives.

Typical Applications

Custom lithium battery packs Portable power stations Consumer electronics Solar energy storage Robotics Light‑weight e‑mobility devices Industrial portable equipment

Note: This cell has no built‑in PTC. BMS protection board is required for all pack builds. Customer shall verify full system matching for end‑product application.

Stock & Wholesale Information

✅ Mass stock ready for prompt shipment. ✅ Favorable bulk pricing for different order volumes.

Get Your Quote

We provide custom price based on your order quantity and shipping requirement.

Please contact our sales team to get the latest unit price, MOQ, lead‑time and datasheet download link. Fill in your demand details, and we will reply quickly.