If you have autorcm on and you don't charge your switch and it goes flat then you need to leave it plugged into the AC charger for a while* (from what I've seen about 60minutes) before you can reboot the console and re-enter RCM before charging normally...
- Firstly, let’s explain exactly what AutoRCM is. In order to get CFW working on your Switch, you must enter RCM and push a payload, which can be quite a pain in the ass depending on what method you are using to bridge the pins on the right Joycon rail. AutoRCM alleviates this by having your Switch boot directly into RCM. This can be healthier for the Switch as you won’t be tinkering with the Joycon rail on each boot. However, you will be unable to boot your Switch unless you send a payload to it on each boot. If you turn your Switch off periodically and occasionally would like to boot into OFW (Original Firmware), it’s probably best that you leave AutoRCM behind. However, if you are just interested in running only CFW and do not want to tinker with your Joycon rail on each boot, AutoRCM is for you!
AFAIK Hekate is the only way to properly shutdown with AutoRCM.
Thank you for this indepth response