New Battery Has Vent Hole

[bestseany]

Put a new Battery on my Avensis tonight as the old one was dying.

The new Battery has a little breather hole on the side of it though, whereas the old one didn't. It came with a little bung in it and plastic elbow to connect to cars that have a breather pipe.

I don't have a breather pipe on my car, so do I'm not sure whether to leave the bung in or plug the elbow in on its own and point it downwards?

Any ideas?

[Mistermena]

Put a new battery on my Avensis tonight as the old one was dying.

The new battery has a little breather hole on the side of it though, whereas the old one didn't. It came with a little bung in it and plastic elbow to connect to cars that have a breather pipe.

I don't have a breather pipe on my car, so do I'm not sure whether to leave the bung in or plug the elbow in on its own and point it downwards?

Any ideas?

What make of Battery are we talking about? I've never heard of one like this!

[Pat2u]

I don't think i fancy one of them batteries, it sounds as if it gasses up it would spit Battery acid out into the engine bay, has it got filler caps on the top to top up ?

Did you get instructions for the Battery, i think toyota would not fulfill its 6 year body warrantee if any damage was caused by Battery overflow of acid.

[bestseany]

This isn't a new thing, some cars have vent pipes specially for the Battery, especially cars that have a Battery in the boot, i.e. BMWs.

The Battery is Yuasa, so a well known decent brand and it's a maintenance free one so definitely does not need topping up.

This is how I have the vent at the moment....

[cmia]

that Battery is not maintanance free...

[bestseany]

that battery is not maintanance free...

Yes, it is. It even says so on the side of it.

Maintenance free just means it's unlikely to ever need topping up. It can still be vented and maintenance free.

[Jamesbelfast]

Vented car batteries are very common. In fact many have a small bore tube attached which allows gases to be vented down to the under-side of the car. If it were mine I would get some hard plastic pipe and vent it outside of the engine bay in order to reduce the risk of explosion.:)

[Thermal]

Most modern car batteries are of the sealed type.

This means that the acid in it cannot escape and that they have a gas recombination system for the gases that are produced during charging and discharging.

Vented batteries, however, were used in an era where gas recombination batteries were expensive and charging control systems in cars were rudimentary, to todays standards.

Vented batteries are not maintenance free, because the oxygen that is vented cannot be used to recombine into water anymore.

That's basic chemistry.

Even when a Battery is of the "sealed" type, gas can still escape through safety valves in the cells.

Batteries should therefore always be charged in a well ventilated area, which the engine bays is.

However when a Battery is placed in a different, non ventilated area in the car, a designer may prescribe a vented Battery connected to a tube to the outside.

Without knowing the battery make and type, there's not much to say.

IMHO such battery does not apply to an Avensis.

[acetip]

nothing wrong with your new batt.its ok for your car.just take Jamesbelfast advice.

[bestseany]

I think I will, I'll get some plastic tube and run it to the bottom of the engine bay