Det kommer an på om bruksanvisningen krever åpen batteriluke.

It means it depends on.

This is a fixed expression in Norwegian:

• Det = it
• kommer = comes
• an på = part of the idiom

So even though the words literally look like it comes on/on to, the whole phrase should be learned as it depends on.

Examples:

• Det kommer an på været. = It depends on the weather.
• Det kommer an på om han har tid. = It depends on whether he has time.

Here det is a dummy subject, just like it in English expressions such as:

• It depends
• It is raining
• It seems strange

Norwegian often needs a subject in the sentence, so det fills that role even when it does not point to a concrete thing.

Here om means whether.

So:

• Det kommer an på om ... = It depends on whether ...

In other contexts, om can also mean if or about, so learners often find it confusing. In this sentence, whether is the best match.

Because om bruksanvisningen krever åpen batteriluke is a subordinate clause.

In Norwegian subordinate clauses, the word order is usually more like standard English:

• om bruksanvisningen krever ...
• whether the instruction manual requires ...

You do not invert the verb and subject here.

Compare:

• Main clause: Bruksanvisningen krever ...
• Subordinate clause: ... om bruksanvisningen krever ...

Bruksanvisningen means the instruction manual or the instructions, depending on context.

It is made up of:

• bruk = use
• anvisning = instruction/direction
• -en = the definite ending

So:

• en bruksanvisning = an instruction manual
• bruksanvisningen = the instruction manual

Norwegian often forms nouns as compounds, so what would be several words in English can become one word in Norwegian.

Batteriluke is a compound noun:

• batteri = battery
• luke = hatch, flap, compartment cover

So batteriluke means something like:

• battery compartment cover
• battery flap
• battery door

The exact English translation depends on the device.

Because åpen agrees with batteriluke, which is a common-gender singular noun.

Norwegian adjective agreement works like this:

• en åpen luke = a/the open hatch
• et åpent vindu = an open window
• åpne luker = open hatches

Since luke takes en, the adjective form is åpen.

In careful, standard prose, many learners would expect en åpen batteriluke, and that is often the safest version to use.

So a very natural learner-friendly version would be:

• Det kommer an på om bruksanvisningen krever en åpen batteriluke.

Without en, the phrase can sound more compressed, technical, or headline-like, as if it means requires open battery compartment cover as a condition or specification.

So:

• krever en åpen batteriluke = safer and more standard for learners
• krever åpen batteriluke = possible in a compact/technical style, but less straightforward

Krever is the present tense of å kreve = to require.

Forms:

• å kreve = to require
• krever = requires / require
• krevde = required
• har krevd = has/have required

In this sentence:

• bruksanvisningen krever ... = the instruction manual requires ...

It is understandable, but many speakers might make it slightly more natural by adding the article:

• Det kommer an på om bruksanvisningen krever en åpen batteriluke.

Depending on the exact intended meaning, they might also rephrase it in a more idiomatic way. But grammatically, the main learning points in the original sentence are still very useful:

• Det kommer an på = it depends
• om = whether
• compound nouns like bruksanvisningen and batteriluke
• adjective agreement in åpen