Mazharuddin Depends upon your daily usage you use phone to much from morning when you wake up to night then no need for custom charging opt from smart i.e. charge over night so that it will charge slowly and be 100% in morning this is best when you need to have phone ready by morning and use heavy all day without charge. If you charge phone in morning and go to work and return back evening and charge back then use custom charging set it to 80% because lithium ion batteries should be charged between 20% to 80% for long term usage battery health
