we got a new update in samsung m12

help me battery drain issue in samsung j4 after update ui 2.0 android 10.

i updated my mobile from 9.0 to 10 with one ui 2.0 in samsung j4 (j400f).after update it is draining battery heavy with use or not.so guys please help me . version:     is there any solution for downgrade from 10 to 9 in j4?if possible given me a lin...