Denso BHT-1800 Series Hardware User Manual page 30

Switch on the function and choose when to have this mode automatically activated. After enabling this
function, the title bar of the screen will turn orange.
The battery saver mode will automatically become inactive when BHT is being charged.
Battery optimisation
With Battery optimisation enabled for the applications, you can make sure they stay inactive when your
BHT is idle or when applications have not been used for days.
On battery screen, tap Menu and then select " Battery optimisation " .
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