The ColdPower is, to-date, one of the coolest Bitcoin-adjacent things I’ve ever seen. H/t nostr:npub1az9xj85cmxv8e9j9y80lvqp97crsqdu2fpu3srwthd99qfu9qsgstam8y8
Tin-foil mode activated 😂🫡 
Discussion
Useful. When LoRa bitcoin nodes brought to you by coin kite?
I was thinking exactly the same 🤓
😎
I love ‘em 🔥
Agree. I searched all over Amazon for something similar, but nothing comes close. It's not just for tinfoil hats; it's a great emergency charger. It's so compact, perfect for travel, or having it in a bug-out bag.
Emergency charger 🤯 what a great point!!!
Mobile phone power banks work just as good and their supply chain isn't related to Bitcoin
True, but I trust Coinkite more than I trust miscellaneous Chinese company
using primary alkaline batteries to recharge or power devices is a real use case; like a burner phone reserved for gps in back-country situations, you need to be able to carry a quantity of alkaline batteries and recharge in the field over a span of days or weeks. Obviously not important for most people in most situations, but still, a real use case for those who need it.
Yes, love that Little thing🧡
this board is really brilliant
That's the only way I use mine
This must be the only product of the line I'm confident I do not need. Clearly I'm missing something. What security risk am I exposing my stack to when using say, a phone charger?
If the phone charger and cord are both capable of transmitting data, then you have a new attack surface for a device that has otherwise never been plugged into another computer.
Ex: USB phone charging ports in airports are notorious for being modified by bad actors to steal your phone data when you plug it in.
Agreed 🫡
Makes way more sense to power sensitive electronic devices with clean DC power than with dirty modified AC power from a charge cube. I wouldnt stick my Coldcards into anything else.
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True 👍
What is the tinfoil hat vector here?
The idea that plugging the device into a laptop or other data-capable device creates an attack surface that doesn’t exist if all its electricity comes from a battery
This is as air-gapped as it gets!
I read this in Tools of Titans, by Tim Ferris(Sammy Kamkar section)
USB is insecure, but the cold power uses a battery and even if it was compromised, the cable attaches to a magnet so there's no way to transmit data to it.
Even if this is not in your threat model, however, it makes it easier to sign transactions in a bank vault where there might not be an outlet.
