Vapcell F40 / Epoch 18650 Ultra-High Capacity Li-ion Battery (4000mAh, 10A, Flat Top 3.7V)

Experience peak runtime in high-drain and ultra-long-lasting battery-powered devices with the genuine INR18650 4000mAh rechargeable lithium-ion battery cell. Representing the absolute pinnacle of energy density in the 18650 form factor, this breakthrough cell provides an unprecedented 4000 mAh capacity while delivering a solid 10A continuous discharge current.

Utilizing advanced silicon-graphene hybrid anode chemistry, this battery provides long cycle life, low internal resistance, and minimal self-discharge. It is an outstanding power source for high-end LED flashlights, portable power banks, wireless IoT equipment, medical electronics, and custom multi-cell battery pack builds (such as e-bike auxiliary packs and drone ground station power) where maximum capacity in a compact 18 x 65 mm footprint is mandatory.

Key Features:

• Maximum 18650 Capacity (4000 mAh): Highest energy density available in the standard 18650 form factor for maximum device runtime.

• 10A Continuous Discharge Current: Capable of handling moderate power loads without excessive voltage sag.

• Advanced Chemistry: Features silicon-composite anode technology for enhanced charge retention and cycling durability.

• Standard Industrial Flat Top: Unprotected industrial flat-top configuration ideal for spot-welding into custom battery packs or fitting into tight battery bays.

Specifications:

• Standard Size: 18650 (18.3 mm Diameter x 65.0 mm Height)

• Nominal Capacity: 4000 mAh

• Nominal Voltage: 3.6V – 3.7V

• Full Charge Voltage: 4.20V ± 0.05V

• Discharge Cut-off Voltage: 2.5V

• Max Continuous Discharge Current: 10A

• Terminal Type: Flat Top (Unprotected)

• Rechargeable: Yes (Standard Li-ion CC/CV charging protocol)

• Weight: ~48 g