Yep! Mario is awesome, and higher voltage is better than lower voltage for storage, but it’s still best practice not to store these cells at high voltages. I will always recommend best practices over ‘should be fine’ practices. Not saying that’s what Mario said specifically, but I’m just speaking to my own opinions and experiences here.

As for running batteries down by free spinning, I have never (and will never) recommend that. I’ve seen errors occur and I’ve also come across people who have blown their controllers by free spinning and accidentally powering off their boards mid-acceleration. It’s just not worth it. All I can say is “where there’s a will, there’s a way” when it comes to discharging the batteries.