Battery question

[KraziAzn]

2 Simple question

I UNPLUG Negative then Pos? (Just making sure im not wrong)

and

I PLUG in which 1st? neg or pos?


sorry for the uber retarded question....my dad taught me once...but i wasnt listening and i dont want to ask him...casue he'll just give me an hour crap on "how i never listen"

ty guys!

[NIGHTHAWKSI]

remove: take off negative first, then positive.

install: attach positive first, then negative

[KraziAzn]

ty just as i thought...

now im wondering...what would happen if i unplugged it incorrectly?

[GlxyGry06Si]

what happens if you do it the wrong way. i never knew there was a correct way to do it.

[KraziAzn]

my dad told me it'll blow up on me... lol


i dunno if he was for real

[NIGHTHAWKSI]

no..wont blow up. not quite sure myself what would happen...thats just what i was taught.

[BigT]

Originally Posted by KraziAzn

ty just as i thought...

now im wondering...what would happen if i unplugged it incorrectly?

Most likely nothing would happen. However, it is a precaution against a couple things.

First of all, if you take the negative off first (and on last) you have less of a chance of an electrical spike which could damage circuits. It isn't very likely, it is just better safe than sorry.

The main reason to do it this way however, is that if you take the negative off first and the wrench touches something metal nothing happens. Then when you take the positive off if the wrench touches something metal still nothing happens because the negative is already off.

If you take the positive off first and your tool touches something metal it can cause a short. If you are careful it might not be that likely, but I have seen it happen many times (I may have even done it myself).

[KraziAzn]

ahhh ty

Off to reset my ecu then!

[BigT]

Originally Posted by NIGHTHAWKSI

no..wont blow up. not quite sure myself what would happen...thats just what i was taught.

In extreme cases it technically could blow up. I have seen it the aftermath and could probably show you pictures of a blown up battery or two. However it isn't very common.

The scenario would involve a bad, severely discharged battery. Batteries in this condition create Hydrogen Gas. In this situation the battery could explode if you do anything to cause a spark like taking the positive side off first, or creating a short.

Again, it isn't very common. I work with batteries a lot (in generators) and I haven't had one blow up on me yet. But I have seen the results of several exploded batteries. It does happen. If I am changing a battery which is particularly old or if I have reason to believe it is severely discharged I take extra care around it.

[KraziAzn]

lol my dad was rite....kinda...

he made it seem like it was a 100% thing...


ty for the info! u guys are uber helpful!

[stargate69]

Kinda off the subject here but I had a battery blow up on me about 30" from my face. There was a "diiiinnngg" in my hears that lasted for about 30mins. Other than that, i just got my clothes dirty and smelly when the battery "popped".