Ergonomically design, to fit in your hand

GRP v400

Designed to perfectly fit with the 13.5 mm Ducore® X Cartridge, this 400 mAh In-Palm battery is a compact, ergonomically designed battery to fit comfortably in your hand—a great combo kit.
Model No8408
Body Material:Aluminium Alloy
Battery Capacity:400 mAh
Activation Mode:Button Activated - VV
Charging Port:Micro USB
Compatible Tank:Ducore X
Colors:White, Black, Grey, Red, Blue, Champagne, Moss Green, Turquoise Gradient, Purple Gradient

We provide customized solutions. Contact us for details.

Aluminium Alloy

Built for durability

The main body of the GRP v400 uses 6000 series aluminum alloy material, which makes the battery more durable to use with a long-lasting finish.

Adjustable Constant

3 Output Modes

This In-Palm battery can be adjusted to 3 different constant voltage settings: 2.9V, 3.3V, 3.6V,just click the voltage button to adjust, this gives you more heat options to tailor to your vaping experience.

1A Fast Charging

USB Charging

The battery uses micro USB charging, the charge current up to 1A, which gives quick charge

Powerful Battery

Rechargeable Built-in Battery

The built-in 13300 high drain battery that comes with the In-Palm 400 mAh ensures robust battery performance and constant output.


Pre-heat Activation

Hold and press the button for  3 seconds to enter into preheat function. It will take 10 seconds for the device to automatically heats the coil to give you the best pure flavor instantly.


Built for convenience

No need to screw the tank to the mod, more convenient to use.

Available for

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

Want to test out our products? Contact us for a FREE sample.

Components View

GRP v400 with Ducore® x

Drip tip
Glass Tube
510 Connector Thread
Fire Button
E-Liquid Window
Ventilation Holes
USB Charging Port
Voltage Button
Voltage Indicator

Technical Specs


55.9 x 35.4 x 20.4 mm

Activation Mode

VV (Button Activated)

Battery Capacity

Built-in 13300 high drain battery (400 mAh)

Body Material

Aluminium Alloy

Voltage Output

2.8V, 3.2V, 3.6V

Charging Port

Micro USB

Charging Current

Fast Charging 1A

Connector Thread

510 Thread (M7)

Cartridge Size

13.5 mm



Compatible Cartridges

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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