Is there a way to increase the battery life of the PinePhone?

[Avisando]

Just got my keyboard yesterday afternoon,  and I am using it on one of my "test" phones, I have not made a call on it yet.
I am planning on trying that with an earphone,  the onboard microphone should work ok.
Perhaps speaker phone will suffice ?  The echo seems to almost disappear if you turn down the microphone volume.
Would only need an ear phone for private conversations.
But yes, putting a keyboard to your ear does not sound comfortable.

Thanks for these informations