Comio S1 does have a very decent battery back up. It has 2700 mAh Li-Polymer non-removable battery which offers almost 15 hours of talk time and up to 143 hours of stand by period.
Comio S1 is equipped with latest Android 7.0 Nougat.
No. Comio S1 does not the face recognition ability.
Comio S1 has got 1.3 GHz MediaTek MT6737 chipset.