@epierre said: Both need protection (internal or external) from excessive discharge (or excessive charge, and short circuits etc) That is where our new library to check battery level goes in, we could dream to have an internal mysensor security check of a LiPo battery ! they do so in 'copters I may pass on that. I'm not used to software glitches having quite so much potential impact, and I don't need to save every gram. But to each their own!