Rechargeable 18650 lithium-ion cell Samsung INR18650-35E-FT 3.7V 3500mAh with welded nickel contact tabs

Samsung INR18650-35E-FT is a cylindrical rechargeable 18650 lithium‑ion cell with a nominal voltage of 3.7V and a rated capacity of 3500mAh. The cell is supplied with factory‑welded nickel contact tabs to simplify series and parallel assembly when building battery packs. Designed for applications that require a high‑capacity 18650 format, the cell combines consistent energy density with stable voltage characteristics typical of INR (nickel‑manganese‑cobalt) chemistry.

Advantages

The cell’s 3500mAh capacity delivers extended runtime in devices while maintaining compact 18650 dimensions. Factory‑welded nickel tabs reduce assembly time and improve connection reliability compared with manually tabbed cells. INR chemistry provides a balance of energy density, moderate discharge capability and thermal stability, making the cell suitable for multi‑cell pack configurations. Standard 3.7V nominal voltage ensures compatibility with common lithium‑ion protection and charging circuits.

Suitable for

• Custom battery packs for portable devices and power tools
• High‑capacity flashlight and torch assemblies
• E‑bike and electric scooter battery modules (with appropriate BMS)
• DIY energy storage projects and hobby electronics
• Backup power units and handheld equipment

Key specifications

• Cell format: 18650 cylindrical
• Chemistry: INR (nickel‑manganese‑cobalt) lithium‑ion
• Nominal voltage: 3.7V
• Rated capacity: 3500mAh
• Factory‑welded nickel contact tabs for pack assembly
• Typical charge method: CC‑CV (constant current, constant voltage)
• Recommended charge voltage: 4.2V per cell
• Operating temperature range: see manufacturer guidelines for charge/discharge limits

How to use

Use the cell in accordance with lithium‑ion charging and protection practices. Assemble cells using the welded nickel tabs to create series/parallel configurations as required by the target pack voltage and capacity. Always include a suitable battery management system (BMS) or protection circuit to prevent overcharge, overdischarge and overcurrent. Charge cells with a charger that provides CC‑CV control and limits per‑cell voltage to the recommended charge voltage. Avoid mechanical damage, short circuits and exposure to extreme temperatures during use and storage.

Usage recommendations

For safe and reliable performance, balance multi‑cell packs during initial charging, implement cell balancing in the BMS for long‑term cycling, and follow manufacturer guidelines for maximum continuous and pulse discharge currents. Dispose of or recycle cells according to local regulations.