Nwichert

Hello,
I have tried to research this, but have got mixed answers. My auxiliary battery died and a few places recommended this from amazon. . I went ahead and bought it and works great, however it has no port for the venting tube. I understand that AGM batteries are not suppose to vent, but still can if they fault? Is this hazardous to have in my car without ventilation?

Even when I look at batteries offered by places like battery plus like this: https://www.batteriesplus.com/produc...-benz/cyl10001. It does not appear to have a venting port either.

Long story short. Is it safe to have an AGM battery in my cabin without the venting hose being connected?

Thanks!

EDIT: I drive a 2017 MB GLA 250

JettaRed

iTrader: (1)

Was there a hose for the old battery?

You got a motorcycle battery which probably doesn't need venting.

Nwichert

there is a hose within the battery compartment and there was a spot to attach it on the old battery. It appears that the generic auxiliary batteries are all “sports performance batteries” meant for a variety of applications; but with the same specs.

streborx

Sealed lead acid batteries don't vent -- that's why they're called "sealed".

JettaRed

iTrader: (1)

The Auxiliary Battery may or may not be vented. What was the part number of your old battery. Here is my Aux Battery from my SL. It is non-vented. I think my C-Class uses a different battery. I will have to check it later. However, this battery does not have the same specs as the battery you got from Amazon.

JettaRed

iTrader: (1)

The main battery from my car is a VRLA, non-spillable and is vented. So, I'm guessing sealed and non-spillable are not the same.