Before use, the battery must be charged.

电池使用前必须充电。

《牛津词典》

It should be shaken before use.

使用前要甩一下。

youdao

Leave overnight before use.

放一晚上再用。

youdao

They were told to use the gels twelve hours before sexual intercourse and again within twelve hours after sex.

VOA: special.2010.07.21

What was neat about it is before that time, the predominant species to use for air conditioning or refrigeration was ammonia.

在这之前是很整洁的，之前最主要的用于空调或者冰箱的,物质是氨。

麻省理工公开课 - 固态化学导论课程节选

Use this pattern in any situation where you want to explain you've done it before.

当你想解释之前已经做过某事的时候，可以在各种情形下使用这个句型。

I've already 课堂 - SpeakingMax英语口语达人

You mentioned before use of executive authority in the context of the State of the Union speech next week.

WHITEHOUSE: Press Briefing

Stored batch materials cool and must be reheated before use, conditions that can create flaws in the rubber, as well as waste.

ECONOMIST: Re-inventing the wheel

Mervyn Storey of the DUP raised the question of 3, 000 homes in Ballymoney where customers had been advised to boil water before use.

BBC: Question Time: OFMDFM and Regional Development