PANASONIC 21700

The Panasonic 21700 Series Cylindrical Lithium-Ion Bare Cell Lineup features authentic, Grade-A Panasonic cylindrical cells renowned for Japanese precision engineering, high energy density, and dependable cycle longevity. Built around the high-capacity Panasonic NCR21700T (4800mAh, 12A), this advanced 21700 format delivers significantly higher capacity and volumetric efficiency than traditional 18650 cells, making it the premier choice for custom battery pack builders, e-mobility integrators, and industrial energy storage systems.

Key Features:

• Authentic Japanese Quality: Genuine Panasonic industrial-grade cylindrical cells engineered to rigorous manufacturing tolerances for consistent internal resistance and voltage stability across cells.
• High 4800mAh Energy Density: Substantially increases total watt-hour capacity per pack volume, maximizing runtimes for electric mobility and portable equipment.
• Reliable 12A Discharge Delivery: Provides stable continuous current capability under load without excessive thermal buildup, ideal for medium-to-high drain multi-parallel pack architectures.
• Advanced 21700 Form Factor: Precision dimensions (approx. 21.2mm diameter × 70.3mm length) offering modern mechanical packaging efficiency and high thermal dissipation.
• Flat Top Terminal Design: Clean, unraised flat-top positive terminals designed specifically for automated or manual nickel-strip resistance spot welding.
• Low Self-Discharge & Long Cycle Life: Premium cell chemistry ensures minimal capacity loss during extended storage and delivers hundreds of reliable charge-discharge cycles.

Specifications:

• Brand: Panasonic
• Model: NCR21700T
• Cell Format: 21700 Cylindrical Bare Cell
• Chemistry: Lithium-ion (Li-ion)
• Nominal Capacity: 4800mAh
• Nominal Voltage: 3.6V / 3.7V per cell
• Maximum Charge Voltage: 4.20V ± 0.05V per cell
• Discharge Cut-off Voltage: 2.5V per cell
• Continuous Discharge Current: 12A
• Positive Terminal: Flat Top (Bare, unprotected cell)
• Dimensions: Approx. 21.2 mm (Diameter) × 70.3 mm (Length)
• Weight: Approx. 68.0g per cell
• Protection Circuit: None (Unprotected bare cell)

Package Options:

• 1 PCS: Single cell option for sampling, bench analysis, or single-cell replacement projects.
• 10 PCS: Entry pack for compact DIY power banks, cordless tools, and small portable modules.
• 20 PCS: Ideal quantity for building 10S2P lightweight e-scooter or 4S5P portable power stations.
• 50 PCS: Standard volume bundle for multi-series e-bike batteries and medium energy storage systems.
• 100 PCS: Full factory case for professional pack builders, bulk fleet maintenance, and large-scale parallel battery banks with closely matched factory batch IR.

Safety & Usage Restrictions (Important Bare-Cell Notice):

• Unprotected Bare Cell Warning: These are bare industrial cylindrical cells without built-in protection circuit boards (no PCM / PCB).
• Professional Assembly Only: Strictly intended for qualified technicians and pack assemblers who integrate an appropriate Battery Management System (BMS) with overcharge, over-discharge, over-current, and cell balancing protection.
• Never Carry Loose Cells: Do not carry loose cells in pockets, bags, or toolboxes where contact with keys, coins, or metal items can cause catastrophic short circuits. Always store in non-conductive plastic battery cases.
• Prohibited Consumer Uses: Not for loose consumer use in flashlights, vaping devices, or household appliances lacking dedicated cell containment and BMS protection.
• Charging Protocol: Charge exclusively using dedicated CC/CV lithium-ion smart chargers (0.5C to 1C rate recommended). Never exceed 4.20V per cell and never leave charging batteries unattended.
• Pre-Weld Inspection: Verify equal cell voltages and inspect shrink wrap insulation prior to resistance spot-welding. Never solder directly onto cell terminals with a soldering iron.

Recommended Applications:

• Electric Bicycles (E-Bikes) and Electric Scooters
• Cordless Power Tools and Garden Equipment
• Custom DIY Multi-Series/Parallel Lithium Battery Packs
• Off-Grid Solar Energy Storage Systems (ESS) and UPS Backup
• Robotics, Automated Guided Vehicles (AGV), and Ground Electronics

Why Choose DXF:

DXF POWER sources factory-fresh Grade-A cylindrical cells with strict quality control, ensuring consistent internal resistance, reliable voltage curves, and secure protective packaging for worldwide delivery.