General Question

flo's avatar

When to use dry batteries, when to use wet batteries, and where do you find them?

Asked by flo (11613points) 2 weeks ago

https://tinyurl.com/y6o2367y (Google dry cell versus wet cell batteries)
When do you use dry and when wet? Where do you find them?
Is there any danger using either of them?

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11 Answers

kritiper's avatar

In many cases, dry cell batteries are not rechargeable, where wet cell batteries are. Dry cell batteries were once used in old telephone systems and wet cell batteries are used in automobiles.
“Dry cell, a voltaic cell whose liquid constituents have been made more or less solid by means of absorbent material” -from The New Century Dictionary, 1944 ed.
Like a flashlight battery.

Lightlyseared's avatar

Wet cell – car battery
Dry cell – everything else.
@kripter you can get rechargeable dry cell batteries. The Lithium ion battery in your phone is a dry cell battery, for example.

kritiper's avatar

@Lightlyseared I did say “In many cases…” I didn’t mean in every case.

flo's avatar

Ok, thanks @kritiper and @Lightlyseared. I asked because I saw “Dry cell” on a AAA batteries, and so does it mean it’s not _alkaline?” How come they needed to put that label?

kritiper's avatar

It could still be alkaline. The main point is that the liquid (acid) is stabilized by the absorbent material so it would not spill out if the battery is turned upside down.

flo's avatar

@kritiper So, the label is telling me not to worry about it ever leaking, they just solved the problem?

kritiper's avatar

It may still leak (seep) if only slightly. Sorta like a damp rag. Dry cells aren’t suppose to leak but they do sometimes. But it’s not like the battery in your car that would definitely drip acid if inverted.

Response moderated (Spam)
flo's avatar

I see leaky batteries AA or AAA mostly.

Why can’t car batteries be dry by the way?

kritiper's avatar

@flo I would guess it has to do with the rapid need for maximum circulatory acid contact with the plates and the need for so many CCAs (Cold Cranking Amps) to turn the engine over when the engine is cold. For example, an engine displacing 350 cubic inches needs a minimum of 350 CCAs. You just can’t get that kind of acid contact with acid that is being held in an almost solid state. And the colder a battery is, the less effective it is. For a dry cell to do the same job and get rapidly recharged by the alternator and have all of those needed CCAs, the battery might have to be too large and heavy to be practical.
Also, the wet cell battery in your car should last for 5 years and a dry cell might dry out way too soon. With a wet cell, you just remove the caps and refill each cell with water, if it’s low. So ease of maintenance might also be a factor in having a wet cell battery in your car.
Here’s fun fact! As the battery in your car discharges, the hydrochloric acid becomes water. As the battery recharges, the water turns into acid. The plates have much to do with this action.

flo's avatar

Thanks @kritiper . I asked for others. I have to reread it again.

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