AM01 - CubeCell Module - Best Battery?

Hi guys,

hope you are all doing well.
I have a question about the AM01. What is the best battery to power the AM01 Module?
We thought about using an LS17500 but then we saw that the AM01 only supports a max voltage of 3.5v but the ls17500 has a voltage of 3.6v to 3.7v.
Are there any batteries that can be attached to the module directly (ultra-low power design ) or is some kind of regulator needed in any case?

– SirSundays