Beside this power saving mode u mentioned... there is another few ways I would like to recommend to u which I m currently using...
1. Under more battery settings, switch on adaptive battery
2. Under more battery settings, processing speed, switch to optimise d for balance of speed with batt and cooling efficiency
3. Under more battery settings, protect battery, limit charge to 85% to prolong your battery lifespan
4. Background usage limits, ON put unused apps to sleep. Auto detects and very helpful in helping u put apps u don't use to sleep to save overall power usage
Hope that will further help u...
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