This thread is now archived and closed to new comments. Some of the links and information provided in this thread may no longer be available or relevant. If you have a question please post a new topic.
I would condition your battery by doing 10 full discharges to self switch off point, and then getting in the habit of fully discharging it at least once a week as I do with Samsung batteries in 3 Samsung smartphones,...though all my Samsungs up to Note 4 edge have removable batteries which I also rotate with spares once a month.
Whilst Lithiium batters are allegedly memory free, that is not always the case, and even Apple suggest fully discharging
I would expect better battery performance after that process.
You may consider doing a reliable data back up and re-setting to factory settings and a fresh re-install, in case you have any software corruption, which can surruptitionally build up over time.
If I have helped you, a "Like" would be appreciated.
If my advice is a solution, please acknowledge it.
I'm not a Telstra employee. 50 + years exp. in radio comms., eg mobile phones since 1963, two-way radios, base stations, antennas & pagers. Expert in current Telstra Go repeaters & smart antennas. "Being 75 years of age, entitles one to be an expert at everything!!"