Lithium ion battery 3.7V 18650 4000mAh

The Lithium ion battery 3.7V 18650 4000mAh is a rechargeable cylindrical lithium-ion cell in the standard 18650 size, with a nominal voltage of 3.7 V and a rated capacity of 4000 mAh. It is a popular power source for ESP32 and Arduino projects, power banks, flashlights, robots and other portable electronics.

Lithium ion battery 3.7V 18650 4000mAh Specifications

• Chemistry: lithium-ion, rechargeable
• Format: 18650 cylindrical cell (18 mm diameter, about 65 mm long)
• Nominal voltage: 3.7 V
• Full charge voltage: 4.2 V
• Rated capacity: 4000 mAh

Lithium ion battery 3.7V 18650 4000mAh Applications

• Portable ESP32, Arduino and sensor projects
• DIY power banks and battery packs (with a BMS)
• Flashlights and headlamps that take 18650 cells
• Robots, RC builds and Bluetooth speakers
• Solar-charged and backup power projects

What's in the Box

• 1 × 18650 lithium-ion battery, 3.7 V

Tip: Charge only with a lithium-ion charger that stops at 4.2 V, such as a TP4056 module, and do not discharge the cell below about 3.0 V. Use a battery holder or a protection board instead of soldering directly to the cell, and never short the terminals.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.