The battery on my Samsung Galaxy 9+ phone was draining rapidly. Each charge lasted about 4-5 hrs. before being depleted.
I called Samsung & was told to replace my battery, which was 2½ yrs. old. I replaced it 3 months ago.
If my phone is on standby, battery lasts >12 hrs. However, once I start using the phone, the new battery is still only lasting 5 hrs. or less.
I have checked my settings & have all apps sleeping when not in use. The employees where I purchased the new battery said the battery lasting ~5 hrs is "normal for a 2½ yr. old phone." The store is an authorized Samsung repair store.
Is there anything I can do to increase my battery life? I don't want to purchase another phone, but I need one that is RELIABLE. For over $700 purchase price I expected my phone to last longer than 2½ yrs.
My S9 too lasts 2-3 hrs on a single charge. Although I haven't changed the battery yet but what I do is carry a power bank every where I go. I would advise you turn on Adaptive power saving. It does improve battery life a little
You could be using a lot of apps in the background that are making it drain quicker or letting the battery overcharge and harming it. Make sure that you get the battery replaced at Ubreak ifix next time
I had battery replaced 3 months ago at Batteries plus Bulbs, which is a certified Samsung repair center. I'm resigned to fact that I probably need to replace phone. That is sad. I am mostly home bound & having a reliable phone is a necessity.