What you are saying (please, correct me, if I am wrong again), is that the Li-Ion batteries are unstable, but you can keep them safe (no over-current, no over-charge, no over-heat). That's fine. After all, multirotors are also unstable, but they fly pretty good.
What I don't know (and where I might be totally wrong), is how bad are current supercapacitors in energy density aspect. The wiki page about Supercapacitors [1] mention it's 10% of Li-Ion, but I have heard about the supercapacitors which are 25% of Li-Ion (not sure, if they are available on the marker, [2]). With 25% of Li-Ion, the supercapacitors for regen would be a better choice than the batteries (see the reasons in my first message). At 10%, you're correct.
Comments
What you are saying (please, correct me, if I am wrong again), is that the Li-Ion batteries are unstable, but you can keep them safe (no over-current, no over-charge, no over-heat). That's fine. After all, multirotors are also unstable, but they fly pretty good.
What I don't know (and where I might be totally wrong), is how bad are current supercapacitors in energy density aspect. The wiki page about Supercapacitors [1] mention it's 10% of Li-Ion, but I have heard about the supercapacitors which are 25% of Li-Ion (not sure, if they are available on the marker, [2]). With 25% of Li-Ion, the supercapacitors for regen would be a better choice than the batteries (see the reasons in my first message). At 10%, you're correct.
1. http://en.wikipedia.org/wiki/Supercapacitor
2. http://www.technologyreview.com/view/521651/graphene-superca...