
XTAR 18650 4000mAh Protected
The XTAR 18650 4000mAh is the definitive choice for users who prioritize endurance over everything else. By pushing the boundaries of the standard 18650 form factor, this cell offers one of the highest energy densities available on the market, making it the "marathon runner" of the lithium-ion world.
Includes
- 1 x Battery
- 1 x Battery Case (Holds 1)

XTAR 18650 4000mAh: Extreme Endurance. Professional Grade.
Maximum Capacity for Your Most Demanding Projects.
When standard capacity just won't cut it, the XTAR 4000mAh 18650 steps in to bridge the gap. This is an protected cell designed for industrial applications, professional-grade flashlights, and custom battery builds where every milliampere-hour counts.
Key Features
- Ultra-High 4000mAh Capacity: Provides significantly longer runtimes compared to standard 2600mAh or 3000mAh cells, ensuring your devices stay powered through the longest shifts.
- True 3.6V/3.7V Nominal Voltage: Delivers a consistent and reliable power platform for sensitive electronics and high-drain tools.
- Superior Energy Density: Optimized internal chemistry allows for maximum energy storage without increasing the physical size of the battery.
- Industrial Reliability: Manufactured to strict quality control standards to ensure stable discharge rates and a long-lasting cycle life.
- Ideal for Pack Building: The flat-top design makes these cells the perfect candidate for building custom e-bike packs, power walls, or high-capacity portable power stations.
Technical Specifications
|
Attribute |
Value |
|
Model |
18650 4000mAh Cell |
|
Nominal Capacity |
4000mAh |
|
Nominal Voltage |
3.6V / 3.7V |
|
Cell Type |
Lithium-ion (Li-ion) |
|
Top Style |
Flat Top |
|
Protection |
Protected |
|
Net Weight |
48g |
Pairs well with

XTAR 18650 4000mAh Protected
