Disconnect the positive or negative of my battery for drain issue car?

[Jaxx_]

you always disconnect the negative.

lets say you disconnect the positive but while doing so your wrench grounds out on the body your gonna have some sparks. If you had disconnected the negative first you wouldn't have had a problem.

I guess that's true... but if I'm working near the battery it usually has the positive post covered if it's removed. It doesn't really matter to me either way, sometimes I disconnect positive, sometimes negative. Depends on the situation and what I feel is less likely to pop back onto the post when I walk away from the car.

[FLG]

you always disconnect the negative.

lets say you disconnect the positive but while doing so your wrench grounds out on the body your gonna have some sparks. If you had disconnected the negative first you wouldn't have had a problem.

[b*saint]

Positive. Tire conduct electricity now to reduce static when leaving a car.

http://www.hydro.mb.ca/safety_and_education/farm/myths.shtml

I would just disconnect the red.

[MR 325]

The answer is it does not matter.

Negative is easier and also safer because of no worry about sparking it on something. :)

[Cybernix]

Careful, if you listen to 5Toes it might end up taking you 2 weeks to put that battery wire back on :)

[5Toes]

Negative is easier... lol

[CW325]

negative. idk if it matters but thats what i did

[IS300E30]

When my 87 325i convertible sits for a week the battery dies. I am heading out of town for a week and before I disconnected the battery, I decided to check if it was still charged and nope it wasn't.

So, I recharged the battery and would like to keep it disconnected, so it doesn't drain down while I am out of town for a week.

Do I disconnect the positive terminal, the negative terminal or does it not matter as long as one of them is disconnected?