Hi,
the Li-Ion is a good model for the battery part. The part "missing" is the energy CONSUMPTION model.
I don't know if the LTE model is using the energy model (i.e., it drains energy from the battery).
About the "sensors" in the terminal (e.g., GPS, vibration, etc.), they are our of scope of ns-3 and no model currently exists.
Cheers,
T.