I have both the phones. Lyf f1s is 5 times better than redmi 4. Lyf f1s support quick charging, gets fully charged in about 1 hour while redmi 4 takes approx 3 hours. Battery backup of both the phones is good. Redmi 4 lasts upto1.5 days in normal use where as lyf f1s can be used only for a full day. But as it can be charged quickly so in my opinion lyf f1s is better in battery backup. What is your Choice?
Lyf F1S is better one to go for , it offers a range to quality features at a highly affordable price tag. So if you are looking to buy a new smartphone, try out this one, it has the best compatibility with the much demanded voice over LTE.Lyf F1 vs Lyf F1S