I am using Samsung Galaxy j2 mobile from 2016 still i am using this mobile phone .
I observed in these two years battery backup it is very fast discharging battery.
In a day per every 3 minuits discharges to 1 percent decreasing.
I felt that battery is not working .i buyed new battery .
after some days this battery also discharging very fastly.
This Samsung products may be dont have battery backup.
Don’’t buy this Samsung mobiles .