Issue Fault Extreme Battery drain Phone Hot as Iron Mi Xiaomi Redmi Note 4 HD

Hello , Mi Xiaomi Redmi Note 4 getting extremely hot battery drain from 100% to 0% in 2-3 hours Phone slow as turtle Fixed (waisted 3 days on that) As promised few links for the phone Xiaomi Mi A2 Lite i ordered now very affordable slightly better spec than my Redmi note 4 Xiaomi Mi A2 Lite 64GB version: https://www.banggood.com/Xiaomi-Mi-A2-Lite-Global-Version-5_84-inch-4GB-RAM-64GB-ROM-Snapdragon-625-Octa-core-4G-Smartphone-p-1315269.html?p=1G2516288606201309KQ https://www.amazon.co.uk/gp/product/B07FP3T6Z4/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=usbdmx-21&creative=6738&linkCode=as2&creativeASIN=B07FP3T6Z4&linkId=6913559a4e1409c31e76177f0bc1e86f I got the 64GB version but there is cheaper option if storage space is not an issue for you Xiaomi Mi A2 Lite 32GB version https://www.banggood.com/Xiaomi-Mi-A2-Lite-Global-Version-5_84-inch-3GB-RAM-32GB-ROM-Snapdragon-625-Octa-core-4G-Smartphone-p-1315247.html?p=1G2516288606201309KQ https://www.amazon.co.uk/gp/product/B07G36C2ZL/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=usbdmx-21&creative=6738&linkCode=as2&creativeASIN=B07G36C2ZL&linkId=0e3f13751f2c1d2b964b864aba742e77 A2 lite is almost identical replacement 4 me i wanted to go higher spac so i look into Xiaomi Mi A2 which is much better spec and great camera of 20MP but battery only 3000mah (WHY????) https://www.banggood.com/Xiaomi-Mi-A2-Global-Version-5_99-inch-4GB-RAM-64GB-ROM-Snapdragon-660-Octa-core-4G-Smartphone-p-1325247.html?p=1G2516288606201309KQ https://www.amazon.co.uk/gp/product/B07FMPVBQR/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=usbdmx-21&creative=6738&linkCode=as2&creativeASIN=B07FMPVBQR&linkId=4d3553d18755d70625096973a658142d