Vapcell K25 18650 Battery (2500mAh)

The Vapcell K25 18650 Battery is a high-performance lithium-ion cell engineered for users who require dependable current delivery and consistent voltage under load. Designed with demanding vaping setups in mind, the K25 balances strong discharge capability with practical capacity, making it a solid choice for regulated mods, high-wattage devices, and advanced sub-ohm configurations.

With a 2500mAh capacity and a genuine 20A continuous discharge rating, the K25 focuses on stability rather than inflated numbers. Voltage sag is kept under control even when the battery is pushed harder, helping devices perform predictably throughout the charge cycle. This makes it particularly well suited to users who value consistent output rather than short bursts of peak power.

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High-Current Performance and Stability

Built for Demanding Devices

The Vapcell K25 is designed to handle sustained current draw without excessive heat build-up. Its 20A continuous discharge rating allows it to power modern sub-ohm tanks and rebuildable atomisers confidently, while the 35A pulse rating offers additional headroom for brief current spikes.

Rather than prioritising maximum capacity at the expense of output, Vapcell has tuned the K25 to maintain voltage stability during higher wattage use. This results in steadier performance across the full charge range and less noticeable drop-off as the battery discharges.

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Capacity and Runtime Balance

Practical 2500mAh Design

With a nominal capacity of 2500mAh and a minimum rated capacity of 2450mAh, the K25 offers a balanced compromise between runtime and current delivery. This makes it ideal for users who want longer usage between charges without sacrificing the ability to safely run higher-power setups.

The cell operates at a nominal voltage of 3.6V and charges to a maximum of 4.2V, following standard lithium-ion charging profiles for predictable behaviour and long-term reliability when charged correctly.

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Battery Safety and Handling

Important Usage Guidance

The Vapcell K25 is an unprotected 18650 cell and does not include an internal protection circuit. It is intended for experienced users who understand correct battery handling and device compatibility.

Key safety points to follow:

• Use only a dedicated external charger designed for lithium-ion batteries

• Never exceed the recommended charging voltage or current

• Do not over-discharge the battery below safe voltage levels

• Always store batteries in a protective case when not in use

• Never carry loose batteries in pockets or bags

• Avoid exposure to heat, moisture, or direct sunlight

• Replace the battery immediately if the wrap becomes damaged

• Recycle used batteries responsibly according to local regulations

Correct handling is essential to maintain performance and minimise risk.

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Specifications

• Battery Type: 18650 Rechargeable Li-ion (INR)

• Capacity: 2500mAh (2450mAh minimum)

• Nominal Voltage: 3.6V

• Maximum Charge Voltage: 4.2V ± 0.05V

• Continuous Discharge Rating: 20A

• Maximum Pulse Current: 35A

• Energy: 9Wh

• Charging Method: CC/CV 4.2V with 100mA cut-off

• Dimensions: 18mm × 64.9mm

• Weight: 45g maximum

• Terminal: Flat top

• Protection Circuit: None

• Operating Temperature:

  • Discharge: -20°C to 60°C

  • Charge: 0°C to 45°C

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What’s in the Box

• 1 × Vapcell K25 18650 2500mAh Battery

  • Supplied in a protective plastic battery case