# COLDPOWER full context

COLDPOWER is a 9-volt battery to USB power adapter from Coinkite. It is designed for Bitcoin self-custody users who want to power a COLDCARD hardware wallet or other low-power USB device without connecting the device to a computer USB data port.

## What it does

COLDPOWER supplies USB power from a standard 9-volt battery. It is useful when the device needs power but does not need a computer data connection. The site describes it as similar to a USB data blocker or "USB condom," but self-powered.

## Specs

- Product name: COLDPOWER
- Product type: 9-volt battery to USB power adapter
- Input: standard 9-volt battery
- Output: 5 volts, 500 mA max current
- Data path: no USB data path
- Primary use: power COLDCARD and other low-power USB devices without USB data concerns
- Manufacturer/seller: Coinkite
- Official purchase URL: https://store.coinkite.com/store/cldpwr

## Who it is for

COLDPOWER is for Bitcoin self-custody users, COLDCARD owners, and security-minded users who want a simple physical separation between USB power and USB data.

## Related entities

- Coinkite: https://coinkite.com/
- COLDCARD: https://coldcard.com/
- Store: https://store.coinkite.com/store/cldpwr

## FAQ

### What is COLDPOWER?
COLDPOWER is a 9-volt battery to USB power adapter from Coinkite. It powers COLDCARD and other low-power USB devices without connecting them to a computer USB data port.

### Why use COLDPOWER with a COLDCARD?
COLDPOWER helps keep a COLDCARD workflow physically separated from computer USB data connections. It provides power from a 9-volt battery for air-gapped signing, setup, and verification workflows.

### Is COLDPOWER the same as a USB data blocker?
COLDPOWER serves a similar no-data security purpose, but it is self-powered. Instead of passing USB power from a host computer, it supplies USB power from a 9-volt battery.