As I studied, your battery supporting range is currently from 0.9 to 3.3v. We have needs in using from .1.8-4.6v for rechargeable battery.
Some of the chip vendors seem to start to support this range as I mentioned above.
Do you have near plan to support this range in the battery voltage config?
It is easy to config outside circuit when the product size is not constrained. Besides, outside regulator takes extra power consumption.
We would really like to see the possibility to have this into your roadmap and we can program with your chip with peace in mind.