Do you want to know what requirements a cable must meet so that you can use it for your Steam Deck?
Here is the answer.
The Steam Deck requires a USB-C charging cable with 45W as a basic requirement.
The original charging cable from Valve has a power consumption of 100-240VAC 1.2A 50-60Hz . You can use this as a guide.
Steam Deck charging cable: USB-C & 45W
If you are looking for a new charging cable: iFixit stocks the original charging cable from Valve. Alternatively, you can use the manufacturer Anker - the reviews are extremely positive.
Anker also offers power banks that can be used to recharge your Steam Deck. 🤙