Key Features
- 6500mAh High Capacity: Typical capacity of 6500mAh (23.4Wh) with a minimum rated capacity of 6400mAh, delivering reliable extended runtime in demanding applications.
- High-Output Performance: 26A continuous discharge capability (with 90°C surface temperature cut-off) for sustained power delivery across advanced high-drain systems.
- Exceptional Energy Density: Gravimetric energy density of 322 Wh/kg and volumetric energy density of 943 Wh/L, placing the M65A among the most energy-dense cylindrical 21700 cells available.
- Low Impedance Design: AC impedance of ≤14.5mΩ at 30% SOC and DC impedance of ≤25mΩ at 50% SOC for efficient energy transfer and reduced heat generation under load.
- Professional Integration Cell: Unprotected cylindrical steel-can construction designed for full control through external Battery Management Systems in professional pack assemblies.
Overview
The Molicel INR-21700-M65A is a premium high-energy lithium-ion battery cell engineered for advanced mobility, industrial, and energy storage applications where maximum capacity and energy density are the primary design requirements. Delivering a typical capacity of 6500mAh at a nominal voltage of 3.6V, the M65A achieves a gravimetric energy density of 322 Wh/kg and a volumetric energy density of 943 Wh/L — specifications that position it at the leading edge of cylindrical 21700 cell development. A 26A continuous discharge rating, wide operating temperature range of -30°C to 60°C for discharge, and a standard charge time of 1.75 hours at 6.5A make the M65A a well-rounded choice for professional battery pack designers requiring both exceptional energy storage and reliable real-world performance. Its cylindrical steel-can construction and unprotected flat-top format are intended for integration into professionally engineered packs equipped with appropriate BMS protection and thermal management systems. Manufactured by E-One Moli Energy, the INR-21700-M65A is backed by Molicel's established reputation for high-quality cylindrical lithium-ion cell production.
Applications / Uses
- Electric vehicles and high-energy mobility platforms requiring maximum range per cell
- Professional battery pack manufacturing and advanced energy storage system design
- Industrial and heavy-duty equipment where high capacity and energy density reduce system weight
- Robotics and automation systems requiring reliable, high-capacity lithium-ion cells
- Backup power systems and portable energy storage applications demanding extended runtime
Specifications
| Brand: | Molicel |
| Model: | INR-21700-M65A |
| Battery Type: | 21700 Lithium-Ion (INR) |
| Typical Capacity: | 6500mAh (23.4Wh) |
| Minimum Capacity: | 6400mAh (23.0Wh) |
| Nominal Voltage: | 3.6V |
| Full Charge Voltage: | 4.2V |
| Discharge Cutoff Voltage: | 2.5V |
| Max Continuous Discharge: | 26A (90°C surface cut-off) |
| Standard Charge Current: | 6.5A |
| Standard Charge Time: | 1.75 hours |
| AC Impedance (30% SOC): | ≤14.5mΩ |
| DC Impedance (50% SOC): | ≤25mΩ |
| Gravimetric Energy Density: | 322 Wh/kg |
| Volumetric Energy Density: | 943 Wh/L |
| Charge Temperature: | 0°C to 60°C |
| Discharge Temperature: | -30°C to 60°C |
| Shape: | Cylindrical |
| Can Material: | Steel |
| Battery Top: | Flat Top |
| Protected: | No |
| Diameter: | 21.70mm (Max) |
| Height: | 71.00mm (Max) |
| Weight: | 74.5g (Max) |
⚠ Important Safety Warnings
Improper handling or misuse of this lithium-ion battery can result in FIRE, EXPLOSION, or THERMAL RUNAWAY, causing personal injury, property damage, or death. Users must read and follow all safety guidelines before purchase and use. Click here to review the full safety guidelines.
- Critical Warning: Never carry loose batteries in your pocket, purse, or bag. Loose batteries can come into contact with metal objects like keys or coins, causing a short circuit, which may result in severe burns, fire, or explosion. Always store or transport batteries in a protective case.
- Intended Use: This battery is designed for integration into protected battery packs with a Battery Management System (BMS) or Protection Circuit Board (PCB). It is not intended for standalone use or for e-cigarettes, vaporizers, or similar devices.
-
Thermal Runaway: A chain reaction where heat from a failing battery
causes further overheating, potentially leading to fire or explosion.
- Causes: Overcharging, short circuits, physical damage, or exposure to high temperatures.
- Prevention: Use a smart charger, avoid damage, and store batteries in a cool, dry place.
- Storage & Transport: Always store batteries in protective cases to prevent accidental contact with metal objects. Never store loose batteries in pockets, purses, bags, or near conductive materials.
- Inspection: Do not use if the PVC wrapper, terminal insulator, or casing is damaged, dented, leaking, or bulging. Continued use could result in failure, fire, or explosion.
- Charging: Use a smart charger specifically designed for lithium-ion batteries and ensure the charger's voltage matches the battery's specifications. Never overcharge, over-discharge, or leave unattended while charging.
-
Prohibited Activities:
- Do not expose the battery to extreme heat, fire, or liquids.
- Do not short circuit, puncture, crush, or modify the battery.
- Do not charge or discharge beyond the manufacturer’s voltage range.
- Do not dispose of in regular trash—always recycle at approved facilities.
- Emergency Response: If a cell shows signs of thermal runaway (e.g., smoke, swelling, hissing, or heat), stop use immediately and, if it can be done safely, move it to a non-flammable surface (e.g., concrete or sand) away from combustible materials. Lithium-ion cells burn as Class B fires — use an ABC / dry-chemical fire extinguisher, or douse with large amounts of water to cool the cell and prevent the fire from spreading. Do not rely on a small spray; thorough cooling is required, and cells can reignite from residual heat, so monitor the area afterward. (Class D extinguishers are intended for lithium-metal batteries, not lithium-ion.) For any fire beyond a single small cell, evacuate and call emergency services.
Disclaimer
18650Battery.com is not responsible for any damages, injuries, or claims arising from improper use, handling, or failure to follow these safety guidelines. Lithium-ion batteries require strict adherence to all safety protocols. It is the reseller's responsibility to ensure all safety warnings and product guidelines are effectively communicated to customers. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.