_Woland_, You made me think ... in general, I know the principle of the TFT display, but I was always sure that the dark background puts less battery on ... and on laptops I always tried to put on dark themes, and on phones. But in theory, really the difference should not be tangible. In any case, today on the droid the display takes less than before (there was a very bright background).
Now the display takes like this:
before that, he always kept the lead alone.
In any case, the topic is interesting. Maybe we should split this discussion into a separate one, and wait for people who know exactly the answer to say? )