Free Ground Shipping Continental U.S with Order on $99.95
Additional 604B Battery

Additional 604B Battery

Wall Charger (for BX25 Battery)

Wall Charger (for BX25 Battery)

Additional USB Power Bank Battery - Silver


The ZB4000 USB Power Bank (external battery) works with our 5V series heated jackets & vests.  Plus it can charge your smart phones, tablets, lamps and other USB powered devices.  

The lightweight aluminum alloy construction provides ultimate protection.  For additional electrical protection, we used Texas Instrument microchips and thermal sensor  to ensure worry free use and safety.

This power bank can provide more than 3x charging for your smart phone and/or up to 10 hours of heating time in VENTURE HEAT's 5 Volt heated clothing.

Note: Charge the battery by plug-in the included micro USB cable into your computer USB port or use the USB charging adaptor come with your smartphone.

Write Your Own Review
You're reviewing:Additional USB Power Bank Battery - Silver
Your Rating


1. How do I take care of my battery?
For continued performance, the battery must be fully charged before use, storage, and once every 3 months of storage thereafter.

2. What affect the working hours?
The temperature of operational environment, the heating level you select.

3.  How long will my battery take to fully charge?
From empty, the battery will take roughly 8 hours to fully charge. 

Any concerns, please contact:


Power System USB Power Bank
Input 5V
Output 2.1A
Capacity 10,400 mAh
Dimensions 90.5 X 77 X 21.6mm
Weight 250g