Other than the Cold Card MK4, is there a good compact open source Bitcoin only signing device with an SD card for air-gapped signing that does not have (or rely on) an internal, sealed in, proprietary battery that is subject to degradation? No battery at all is my preference.

Looking for something that works with Sparrow multisig. And ideally I’d like to get two of them that I can set up as exact clones of one another and store in separate locations.

I don’t understand this trend lately toward making expensive signing devices that are more like smart phones in their design than simple signers. All of the bells and whistles and onboard accessories are just points of failure IMO.

With the exception of routine firmware upgrades, I don’t even want to look at it. It doesn’t have to look like it has beautiful Apple inspired design.

So far the Jade Classic looks about right. Except for the existence of a battery. Pretty simple. And likely pretty easy to hoop in hurry. They could have made the edges rounder though.

#asknostr