About 60%

It’s all aliexpress. Liitokala batteries and the BMS just looked nice

I looked at the spec sheet and it seems that just taping the cells together like that should provide necessary support for all but the outer sides.

A clamp wouldn’t hurt, but probably give me negligible benefits in the projected lifetime of this pack. I’m not using this very often so the pack will age out before charge wear will be an issue. Say I get 300 charge cycles over 10 years, that would be heavy use for my radio pack.

Thanks. Got to make a clamp for the batteries then.

Don’t know about any pressure. They are charged up and working right now