# How long will my car battery last setting at the airport

**URL:** https://boards.straightdope.com/t/how-long-will-my-car-battery-last-setting-at-the-airport/1007602
**Category:** In My Humble Opinion
**Created:** [September 22, 2024, 11:48pm UTC](https://boards.straightdope.com/t/how-long-will-my-car-battery-last-setting-at-the-airport/1007602 "2024-09-22T23:48:47Z")
**Posts on this page:** 1
**Showing post:** 42

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### Author: ![Crafter\_Man](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/crafter_man/32/458_2.png) [@Crafter\_Man](https://boards.straightdope.com/u/Crafter_Man)
#### Post date: [September 23, 2024, 7:34pm UTC](https://boards.straightdope.com/t/how-long-will-my-car-battery-last-setting-at-the-airport/1007602/42 "2024-09-23T19:34:53Z")

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> [@beowulff](#):
>
> Cars should _ **never** _ be jumped battery-to-battery.  
> Always connect the ground lead last, and to a point on the frame, away from the battery. There’s often a dedicated post for this.  
> Connecting directly to the battery carries a small (but non-zero) risk of a hydrogen explosion, throwing Sulphuric acid in your face.

While we’re on the subject…

If an in-situ car battery is depleted or dead, “jumping” is always Plan B. Plan A is _ **always** _ to charge the depleted/dead battery using a battery charger. (And when doing so, it’s best to electrically isolate the battery from the vehicle.) Plan B should only be performed if Plan A is not feasible.

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