SAMD21 + Portable power! I started out using a trinket + CR2032 board for backing up my NAND. It worked well, but it was a bit ugly and hacky. I decided to integrate it all into a compact board that I could carry along with me when headed out on the go. Using a battery means it's ready to go when you switch it on, no booting up to charge supercaps and then rebooting to start RCM.

Battery not included! Seriously, I would have to mark the package as "Containing Lithium Battery" and it would be restricted to ground-only delivery. The things that you will need to supply yourself are:

• 1) CR2032 battery
• 2) USB Micro B (male) to USB C (male) cable. Go search Amazon for "AmazonBasics USB Type-C to Micro-B 2.0 Cable - 6 Inches (15.2 Centimeters) - Black"
• 3) RCM Jig or paperclip for the right hand controller slot.

NOTE: I do not endorse or condone piracy or unauthorized backups. My usage is limited to NAND backups, and I suggest the same to you. Backup loading and other hacking can be detected, resulting in a ban from online gaming. Don't do anything you don't understand, and don't engage in hardware hacking unless you accept the risk that you alone are responsible for any damage you may cause to your equipment.