My battery doesn't have any springs or compressible "foam" pads. My compression setup is fixed... Just wood with some threaded rods and lock nuts, and a few very thin plastic sheets between the cells. If I was going to do it again though I'd use the foam sheets.Great breakdown of tradeoffs, thank you for that insight
I think foam and springs are the way to go for me.
Inner tubes are less robust and the issues with gasous mixtures and expansion and moisture and maintentance and noise and energy consumption are pretty absent with foam and springs.
Pic of the innards during assembly