Learn French: Ensuite, insérer la batterie fournie. - Next, insert the provided battery.

This is an impersonal command. In French, general instructions like manuals, recipes, and public signs often use the infinitive instead of the imperative. It creates a neutral tone because it isn't directed at one specific person, but rather to anyone reading the instruction.

I learned that battery is une pile. Why does this sentence use une batterie?

In French, une pile usually refers to standard, disposable batteries like AA or watch batteries. Une batterie refers to rechargeable power sources, like those found in smartphones, laptops, or cars. Since this instruction is likely from an electronics manual, batterie is the appropriate word.

Would it be wrong to say Ensuite, insérez la batterie fournie?

It wouldn't be grammatically wrong, but it changes the tone. Using insérez (the imperative) makes it feel like the writer is talking directly to you. User manuals and official instructions usually prefer the infinitive (insérer) to remain objective and impersonal.

Why does fournie have an extra -e at the end?