XTAR 18650 4000mAh Raw Lithium Battery Cell

The XTAR 18650 4000mAh Raw Lithium Battery Cell is a high-capacity rechargeable battery designed for users who need strong, consistent power in compatible devices and custom setups. Delivering a 3.6V output with up to 10A continuous discharge, it’s built for reliable performance in high-drain applications. 

This is a raw (unprotected) lithium-ion cell, making it well suited to battery packs, devices with integrated battery management, and custom applications where protection is handled by the device itself.

With genuine 4000mAh capacity, stable output and long cycle life, it offers dependable performance for demanding setups that require a quality 18650 cell.

Why Choose XTAR 18650 4000mAh Raw Batteries?

• High capacity 4000mAh for extended runtime
• 10A continuous discharge for high-drain devices
• Raw flat-top cell suited to compatible devices and battery packs
• Stable and consistent power output
• 500+ charge cycles for long-term durability
• Reliable performance in extreme conditions (-20°C to 60°C)
• Eco-friendly design with certified materials

What Does “Raw” Mean?

A raw battery is an unprotected lithium-ion cell without a built-in protection circuit.

These cells are commonly used in:

• Battery packs with integrated battery management systems
• Custom electronics and OEM applications
• Devices designed specifically for flat-top unprotected 18650 cells

If you are chasing a battery for a device that already manages battery protection internally, a raw cell can be the right fit.

Best Suited For

• Battery packs with built-in BMS (battery management systems)
• Custom electronics and OEM builds
• Devices designed for flat-top unprotected 18650 cells
• Users familiar with lithium-ion battery requirements

Compatibility Note

Because this is a raw flat-top cell, it is best suited to devices that are specifically designed for this battery type. If your device requires a protected or button-top battery, one of XTAR’s protected cells may be a better option.

Specifications

• Battery Type: Lithium-ion rechargeable 18650 (raw cell)
• Voltage: 3.6V nominal
• Capacity: 4000mAh
• Max Discharge: 10A continuous
• Charging Voltage: 4.2 ± 0.03V
• Charging Current: 2A
• Protection: No (raw/unprotected cell)
• Terminal: Flat top
• Cycle Life: 500+ cycles
• Operating Temp: -20°C to 60°C
• Storage Temp: -20°C to 40°C
• Dimensions: 18.35 ± 0.15mm x 65.05 ± 0.15mm
• Weight: ≤50g