Rechargeable Lithium-Ion Battery Panasonic NCR18650BK 3.7V 3400mAh

Panasonic NCR18650BK is a rechargeable lithium‑ion 18650 cell with a nominal voltage of 3.7V and a rated capacity of 3400mAh. The cell is designed for applications that require high energy density and sustained discharge, offering long run time per charge for compatible devices. It is intended for use in devices and battery assemblies that accept standard 18650 cylindrical cells and should be handled according to manufacturer charging and safety guidelines.

Advantages

The NCR18650BK delivers high capacity in the 18650 form factor, providing extended operating time compared with lower‑capacity cells. The chemistry and construction support consistent discharge performance and efficient energy storage in compact applications. As a rechargeable lithium‑ion cell, it can be cycled many times when charged with an appropriate charger and used within recommended voltage and temperature ranges.

Suitable for

• High‑output flashlights and portable lighting
• Power banks and portable chargers (cells compatible with bank designs)
• Portable electronics that accept 18650 cells
• DIY battery packs and custom battery assemblies with proper cell management

Key specifications

• Cell type: cylindrical 18650 lithium‑ion rechargeable cell
• Nominal voltage: 3.7 V
• Rated capacity: 3400 mAh
• Typical use: high energy density applications requiring long runtime
• Form factor: 18 mm diameter × 65 mm length (standard 18650 size)

How to use

Install the cell in devices or holders that are explicitly specified to accept 18650 lithium‑ion cells, observing correct polarity. Charge the cell only with chargers designed for lithium‑ion chemistry and follow the charger manufacturer’s instructions. Avoid overcharging, deep discharging below the device cutoff, and exposing the cell to extreme temperatures. For multi‑cell packs, use proper battery management and balancing systems to ensure safe operation.

Recommendations

Use cells in matched groups for series/parallel battery packs, monitor cell temperature during heavy discharge or fast charging, and store cells in a cool, dry place at moderate state of charge. Follow official Panasonic charging and safety guidance and replace cells that show physical damage, swelling, or abnormal performance.