This is the 3526th most frequent Swedish word.
dör
"Dör" means "dies" in English.
In this sentence, 'dör' is used as a verb in the present tense to indicate the process of dying or ceasing to live.
Blommorna dör om de inte får vatten.
The flowers die if they don't get water.
Here, 'dör' is metaphorically used for a battery losing its charge, applying the concept of 'dying' to inanimate objects.
Jag är rädd att batteriet dör snart.
I'm afraid the battery will die soon.
While grammatically 'dör' may be used creatively or metaphorically in expressions or sentences for dramatic effect, the sentence context gives it personalized meaning.