I was looking at MHD (Magneto HydroDynamic) drives, so it occurred to me to look at what effect a magnetic field had on batteries.
True as nuts; it improves them!
(Full Paper)
Study on the influence of magnetic field on the performance of lithium-ion batteries:
"...The charge–discharge performance with imposing magnetic field is better than that without imposing magnetic field. The discharge capacity, charge capacity discharge energy and charge energy increase obviously, and they all increase with magnetic induction intensity...
https://www.sciencedirect.com/scienc...52484722003420
So basically + N; - S to improve them.
I have no practical idea how strong an XYZ Tesla field is or how big and heavy a magnet/s is required to get a noticeable effect but doubt lugging a magnet and cell sandwich around is worth it?
Perhaps thin coin shaped magnets of the right diameter is a great way to stick all those button cells together in a series cylinder..?
This may help for charging and stationary batteries however?
Perhaps simply aligning your charging pack with the earths magnetic field will help a smidge? Cant hurt.
Or; align your conveyance's cells horizontally and only ever go North. Don't come back!