Why does the Prius 12V battery have a tube or hose attached? Is it to vent hydrogen to the exterior of the cabin? - Quora
![Battery venting, fitment and options for most BMWs and particularly E30's | RTS - Your Total BMW Enthusiast Battery venting, fitment and options for most BMWs and particularly E30's | RTS - Your Total BMW Enthusiast](https://www.rtsauto.com/wp-content/uploads/2013/05/Battery-venting-hose-routed.jpg)
Battery venting, fitment and options for most BMWs and particularly E30's | RTS - Your Total BMW Enthusiast
![I found a random tube that connects to nowhere by my battery. Any ideas what it is? Renault Clio MK3 : r/Cartalk I found a random tube that connects to nowhere by my battery. Any ideas what it is? Renault Clio MK3 : r/Cartalk](https://preview.redd.it/nnahexilrlr91.jpg?width=640&crop=smart&auto=webp&s=22d2c0309075ec179d57a6bbd84e6fda3ff58737)
I found a random tube that connects to nowhere by my battery. Any ideas what it is? Renault Clio MK3 : r/Cartalk
![Battery venting, fitment and options for most BMWs and particularly E30's | RTS - Your Total BMW Enthusiast Battery venting, fitment and options for most BMWs and particularly E30's | RTS - Your Total BMW Enthusiast](https://www.rtsauto.com/wp-content/uploads/2013/05/Battery-venting-connector.jpg)