I've got my N64 portable running on the bench with batteries now. I'm using this BMS (CX-74-2S): https://www.ebay.com/itm/Intelligent...2S-Packs-18650-lithium-Satellite/311721987212 . It doesn't have a gas gauge nor battery low indicator from what I can tell. I prefer not to use one of those pushbutton battery level gauges since it would be easy to forget to check when you are playing. My preference is to have a simple LED light up when the voltage of the battery drops below (for instance) 7V. This can be achieved with a voltage reference (EG: TL431) and resistors, but it tends to burn quite a bit of current due to resistors. So, I was wondering what other's are doing to provide some sort of low battery indicator. Thank you for the pro tips!