Big power and vaporization in a small package

THK v350/350

Our THK v350/350 Ducore® pen batteries are designed specifically for our larger Ducore® cartridges. With button-activated draw and optimal battery life, customers get reliable results and a consistent excellent vaping experience.
ProductTHK v350THK 350
Model No:99309935
Dimension(mm):13.5 x 77.113.5 x 71.6
Battery Capacity:350 mAh350 mAh
Body Material:Stainless SteelStainless Steel
Activation Mode:Button ActivatedButton Activated
Charging Port:Micro USBMicro USB
Charging Current:0.5A0.5A
Compatible Tank:Ducore XDucore X
Colors:Stainless Steel, Black, White, Blue, Green, Orange, YellowStainless Steel, Black, White, Blue, Green, Orange, Yellow

We provide custom solutions for your brand. Contact us for details.

Adjustable Voltage

3 Output Modes

Adjustable Constant Output Voltage

To give you more heat options to tailor to your vaping experience, the pen battery can be adjusted to 3 different constant voltage settings: 3.0V, 3.3V, and 3.6V. Just quickly press the fire button 3 times to adjust. Power mode will be changed from low to medium to high. Alternatively, a fixed constant voltage output (3.6V) is also available for this pen battery (Product code: 9935).

Stainless Steel

Designed for durability

Stainless Steel Construction

Using a stainless steel main body, the Ducore® pen battery can ensure high quality and stability, which offers you prolonged durability.

Powerful Battery

Safety Protection Charging

A High Capacity Battery backed up by Micro USB 1A charging

Powered by a powerful built-in 350 mAh rechargeable battery that allows the Ducore® pen battery to perform like no other vape pens on the market. You will always have the confidence of a fully charged battery at the time of retail sale.  It comes prebuilt with the standard safety protection to ensure harmless operation when charging or vaping.

Available for

Why not customize our Ducore® pen Battery for your brand? Ispire provide various OEM and ODM solutions for your business.

Want to try our products? Contact us for a sample.


Custom Surface Material Colors

Comprehensive Multi-Color Designs

We offer a wide range of multi-color designs and patterns for your unique customization. Choose from available surface materials plating and printing options using Vacuum Metalizing Plating, Water Transfer Plating, Decal and Pattern Printing, or Spray (Monochrome, Gradient Spray, Spot) Paint.

Components View

THK v350

Technical Specs


THK v350 : 13.5 mm x 77.1 mm

THK 350 : 13.5 mm x 71.6 mm

Activation Mode

VV (Button Activated)

Battery Capacity

350 mAh

Body Material

Stainless Steel


9930 : 3.0v/3.3v/3.6V
9935: 3.6V

Charging Port

Micro USB

Charging Current

0.5 A

Connector Thread

510 thread

Cartridge Size

13.5 mm


Compatible Cartridge

The 510 connector makes the Ducore® cartridge compatible with most batteries on the market.
However, we highly recommend using Ispire batteries for the best vaping performance


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