21700 Battery Cell Samsung 40T

The 21700 Battery Cell Samsung 40T is a high-quality lithium-ion rechargeable cell renowned for its excellent balance of capacity and high discharge current. It features a nominal capacity of 4000mAh (minimum 3900mAh) and a nominal voltage of 3.6V/3.7V. Its maximum continuous discharge current is an impressive 35A (up to 45A under certain conditions), making it an ideal power source for high-drain devices.

The 40T cell is in the 21700 format (21mm diameter, 70mm length) and weighs approximately 67-70 grams. It boasts a low internal resistance, which translates to reduced energy loss and improved efficiency. The recommended charging method is CCCV (Constant Current, Constant Voltage) to 4.2V, with a standard charging current of 2A and a cutoff at 200mA. The cell also supports faster charging rates. The minimum discharge voltage is 2.5V and should not be exceeded.

Key Features:

• High Capacity: 4000mAh (nominal).
• High Discharge Current: 35A continuous (up to 45A under specific conditions).
• 21700 Format: Compact size with high power capability.
• Low Internal Resistance: Improved efficiency and reduced losses.
• Supports Fast Charging.

Specifications:

• Model: Samsung 40T
• Type: 21700
• Chemistry: Li-Ion
• Nominal Capacity: 4000mAh (min. 3900mAh)
• Nominal Voltage: 3.6V / 3.7V
• Maximum Charging Voltage: 4.2V
• Maximum Continuous Discharge Current: 35A (up to 45A)
• Standard Charging Current: 2A
• Maximum Charging Current (Fast Charge): Dependent on charger specifications
• Discharge Cut-off Voltage: 2.5V
• Weight: 67-70g (approximate)

Applications:

• Power Tools
• Electric Vehicles (e-bikes, scooters)
• High-Drain Flashlights
• Vaping Devices
• Battery Packs