
XTAR 18650 4000mAh RAW
The XTAR 18650 4000mAh Raw Cell is engineered for those who prioritize maximum endurance. Breaking the boundaries of the standard 18650 form factor, this high-energy-density cell is designed for long-runtime applications, from high-end flashlights to custom battery pack builds.
Includes:
- 1 x Battery
Suitable for PARD Night Vision Devices

XTAR 18650 4000mAh: The Marathon Runner of Cells
Extreme Capacity. Professional Grade.
When "standard" capacity isn't enough, the XTAR 4000mAh 18650 steps in. This is a raw, unprotected cell intended for industrial use, DIY projects, and devices with built-in protection circuits. By squeezing 4000mAh of energy into the classic 18650 footprint, XTAR provides one of the highest-capacity lithium-ion cells available on the market today.
Key Features
- Ultra-High 4000mAh Capacity: Experience significantly longer runtimes compared to standard 2600mAh or 3000mAh cells. Perfect for devices that stay on for the long haul.
- True 3.6V/3.7V Nominal Voltage: Delivers consistent, reliable power for sensitive electronics and high-drain tools.
- High Energy Density: Optimized internal chemistry allows for maximum power storage without increasing the physical size of the battery.
- Ideal for Pack Building: With its flat-top design and consistent performance, this cell is a top choice for building custom e-bike packs, power walls, or laptop battery replacements.
- Industrial Reliability: Manufactured to strict quality control standards to ensure stable discharge rates and long-term cycle life.
⚠️ Safety First: Understanding "Raw" Cells
Because this is a raw (unprotected) cell, it does not have a built-in Protection Circuit Board (PCB).
- Expert Use Only: Recommended for users who are familiar with lithium-ion safety and battery management systems (BMS).
- Handling: Do not short circuit, overcharge, or over-discharge.
- Storage: Always store cells in a non-conductive battery case when not in use. Never carry loose batteries in your pocket with keys or coins.
Technical Specifications
|
Attribute |
Value |
|
Model |
18650 4000mAh Raw Cell |
|
Capacity |
4000mAh |
|
Nominal Voltage |
3.6V / 3.7V |
|
Cell Type |
Lithium-ion (Li-ion) |
|
Top Style |
Flat Top |
|
Protection |
Unprotected (No PCB) |
|
Dimensions |
18.3mm x 65.1mm |
|
Net Weight |
$\approx 48g$ |
Compatibility & Charging
To maintain the health of this high-capacity cell, we recommend using an intelligent XTAR charger that supports 3.6V/3.7V Li-ion chemistries:
- Recommended Chargers: XTAR VC4SL, VC8 Plus, or the VX4 V2.
- Charging Note: For maximum longevity, a charging current of 1.0A or lower is recommended.
Pairs well with

XTAR 18650 4000mAh RAW
