Which end of a cell for fuse?

Greetings to all..

New user to the forum and I have a question.
I have looked through the FAQ's and searched the forums but to no avail.

Does it matter which end of an 18650 cell the cell level fuse is connected?
I suspect the quick answer will be NO.

Please consider the following:
Is there a possible failure mode of cell chemistry OR cell construction that could result in more energy passing INTO the cell through one terminal than passing through the other terminal?

Take a faulty cell with high internal resistance,
as it is being charged power is being wasted as heat (a HEATER),
now imagine a catastrophic increase in heat generation.

Would the energy going into the cell through the positive terminal be markedly different from the energy passing through the cell and out of the negative terminal?

My apologies if this is a NOOB question.. :angel:

Cheers.

Ideal: Both, you need connections on both sides anyway
Formal: Positive
Technical: Doesn't matter, it is a circuit, current going in will also come out on the other side

As DarkRaven said.

I do both because it goes faster doing it same.

If you are protecting against an internal short, then either end will be OK.

If you are concerned about an external short because you have some type of metal in the battery enclosure, use the positive end. This is because the sides of an 18650 are all one piece with the negative end. I mean that...if the fuse is on the negative end, a cell can still be shorted by something penetrating the plastic sleeve, and connecting the side of an 18650 to the positive of one of the cells in that P-string.

I do both, it's extra safety and doesn't matter since you need to solder both ends anyway. Technically it doesn't matter, either side will work.