Is acid not supposed to spill out of a battery when it tips over?

[tcbass]

I had 2 wet cell Marine Deep Cycle batteries (the kind where you can add water) tip over and a little battery acid leaked out. 

 

A guy said that that's not normal. I said doesn't acid always leak out when a battery tips? I'm mean they have caps that can be removed to add water so they aren't sealed. He said no. He said they shouldn't leak when tipped over. He said if it does something is wrong. 

 

 

So, is he right?

[Way2slow]

It depends on the battery and the type vent system it runs.

Gel and AGM's will not spill out even if left upside down because there is no free liquid in them to leak out. 

Some flooded cell batteries can tip over and not spill unless left in that position for a while, some will leak acid out as soon as they are tipped. The ones that have caps on them that let you add water are more subject to leak than the sealed batteries, maintenance free batteries.  Many of the sealed batteries run a VRLA vent system that helps eliminate spills if the battery is tipped over for short times.

[VolFan]

Did this happen before the trolling motor issue? A lot of the flooded cell batteries will leak if on their side very long, even if they weren't damaged by whatever knocked them over. If you lost some liquid it would definitely affect battery performance.

[tcbass]

59 minutes ago, VolFan said:

Did this happen before the trolling motor issue? A lot of the flooded cell batteries will leak if on their side very long, even if they weren't damaged by whatever knocked them over. If you lost some liquid it would definitely affect battery performance.

 

 

Happened after. 

 

Cleaned acid up and fished for 2 days about 4-5 hours each and no problem. 

 

Will probably end up getting new batteries next year. 

 

I just want to know if these batteries weren't supposed to leak even when tipped over.