Hi guys , I am never the type to go to internet and rant however this time I must to somehow find someone with good lubang or able to help me to recalibrate my battery

So in summary , I've pre ordered and received my phone on 6/3/2019 . On that day I've already noticed my phone drains battery quite fast like 1% in 5 minutes of usage. And using 4G.

I've done simple diagnosis with Samsung customer service via smart tutor and she can obviously see how 20 minutes of using smart tutor can already drain 5%. She then help me to reset setting and ask me to use safe mode and email her the feedback after few hours. And so I did and the feedback is equally terrible as heck. (I switch all unnecessary stuff off like nfc and edge lighting)

She then asked me to go to customer service centre which I did on the same day, they then do further diagnosis and agrees my battery drains faster than usual and accepted my phone
After 2 days they called me and told me my phone is ready for collection and there's nothing wrong with it after a simple factory reset. Upon collection I found out my battery drains very fast again but I didn't think much thinking it's because I am redownlosding all my apps and stuff

Well after days of using it ,I've had enough of this Samsung wasting my time nonsense . Can someone teach me how to recalibrate my battery.

I will start doing screenshot of my battery life cycle tomorrow morning. As for now I woke up at 7.30am and its just 10 .20 now my battery is already 80% ... 20% for just roughly 3 hours and most of the time it's just standby on 4G.
#6/3/2019

1. Collection of s10
2. Notice problem

#7/3/2019

1. Called Samsung and do diagnosis via smart tutor
2. Sent to Samsung service centre one utama and wasted my few hours for their shit service

#9/3/2019
1. Received no updates so I decided to call them to ask
2. Came and collect my phone just to find out nothing has been done and they really do enjoy wasting my time going one utama here and then just so my phone can sleep in their luxurious hotel.

Samsung Malaysia really need to keep their service centre in standards.  Looking by their Google reviews I'm not the only unhappy customer