Questions & Answers about Batteriet i min mobil er næsten tomt, så jeg finder opladeren.
Because batteriet means the battery.
In Danish, the definite article is usually attached to the end of the noun:
- et batteri = a battery
- batteriet = the battery
So Batteriet i min mobil means The battery in my phone.
Also, batteri is a neuter noun, which is why the definite ending is -et.
Because mobil is a common-gender noun in Danish:
- en mobil = a mobile phone
For common-gender nouns, the possessive is min:
- min mobil = my phone
If the noun were neuter (et noun), you would use mit instead:
- et hus → mit hus
So the sentence uses min mobil because mobil is en mobil, not et mobil.