Arduinio pro mini with Battery and step-up converter - experience ?

Hello to the experts here in the forum.
I want to build a portable altimeter with a Pro Mini Arduino, I already have a BMP280 module.
Housing with battery compartment I have in prospect, in the compartment fit only 2 AA batteries (Eneloops) so max. 2.6V voltage available.
Since this is a bit little, especially for a graphic display (3,3V) , I thought of a step-up converter. Does anyone have experience with this?
There are supposed to be better and worse step-up converters.

Thanks,
Frank

Very interesting :slight_smile:

Thanks

Is there such a one also at Reichelt or Amazon ?
I want to order from both soon.

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