Kad god uklonite istrošenu bateriju, idite na sakupljačko mesto.

Here kad god means whenever or every time that.

So:

• Kad uklonite... = When you remove...
• Kad god uklonite... = Whenever you remove... / Every time you remove...

The phrase god adds the idea of repetition or generality.

No. In this sentence, uklonite is not the command.

It is the present-tense form of the perfective verb ukloniti and appears after kad god, so it means:

• kad god uklonite = whenever you remove

The actual imperative in the sentence is idite = go.

This can confuse learners because both forms end in -te.

Because -te can appear in different verb forms.

In this sentence:

• uklonite = 2nd person plural/formal present tense
• idite = 2nd person plural/formal imperative

Serbian uses the same plural/formal ending area for several forms, so you have to tell from context.

Here the structure makes it clear:

• Kad god uklonite... = subordinate clause, not a command
• idite... = main clause, command

Idite can address:

• you all (plural), or
• you in the polite/formal singular sense

In warnings, instructions, and public notices, Serbian often uses this plural/formal style. So it sounds like a general instruction to the reader.

Because bateriju is the direct object of uklonite, so it has to be in the accusative case.

The dictionary form is:

• istrošena baterija = a worn-out battery

But after uklonite:

• uklonite istrošenu bateriju = remove a worn-out battery

Both the adjective and the noun change to match:

• istrošena → istrošenu
• baterija → bateriju

This is feminine singular accusative.

It means a used-up, depleted, or worn-out battery.

For batteries, English would usually say:

• used battery
• dead battery
• depleted battery

The Serbian adjective istrošen literally has the sense of something being worn out from use. For batteries, that is understandable and common enough in practical instructions.

Because na with a verb of motion often takes the accusative to mean to / onto / toward a place.

Here:

• idite na sakupljačko mesto = go to a collection point

The noun mesto is neuter singular, and its nominative and accusative forms are the same:

• mesto = nominative
• mesto = accusative

The adjective agrees with it:

• sakupljačko mesto

If you were talking about being at that place, you would normally use the locative:

• na sakupljačkom mestu = at the collection point

It means collection point or collection site.

A learner should know that this is understandable, but it may sound a bit literal. In real-life Serbian, you may also see more natural phrases such as:

• sabirno mesto
• mesto za sakupljanje
• mesto za odlaganje baterija

So the phrase in your sentence is grammatically fine and understandable, but not necessarily the most idiomatic option in every context.

Because the sentence begins with a subordinate clause:

• Kad god uklonite istrošenu bateriju, = whenever you remove a worn-out battery
• idite na sakupljačko mesto. = go to a collection point

In Serbian, when a dependent clause comes before the main clause, it is normally separated by a comma.

Because ukloniti is perfective and fits the idea of a completed action:

• kad god uklonite = whenever you have removed / whenever you remove

It focuses on the action as a finished event.

If you used an imperfective verb such as uklanjati, the meaning would shift more toward an ongoing or repeated process, which is less natural in this kind of instruction.

So perfective works well because the instruction is about what to do each time the removal is completed.

It is understandable and grammatically workable, but many native speakers might prefer a slightly different wording, especially in a recycling context.

For example, a more natural instruction might be:

• Kad god uklonite istrošenu bateriju, odnesite je na sabirno mesto.
• Istrošenu bateriju odnesite na mesto za sakupljanje.

Why? Because idite na sakupljačko mesto means go to the collection point, while many real notices want to say take the battery there. In that case, odnesite je is often more natural than just idite.

Yes, Serbian word order is fairly flexible, though not completely free.

For example, you could say:

• Kad god uklonite istrošenu bateriju, idite na sakupljačko mesto.
• Idite na sakupljačko mesto kad god uklonite istrošenu bateriju.

Both are understandable, but the original order is good for instructions because it presents the condition first and then the command.

Starting with kad god also makes the sentence feel organized and easy to follow.