is it safe to Jump the coupe?

[aerobod]

Originally Posted by Hawkeye

I think this is pretty much a null point on our Zeds, although some would rather be safe than sorry I guess.

That's the whole point - read and make your own decision!

Any lead-acid battery that is not completely sealed (i.e. has a vent tube or caps of any form) will out-gas hydrogen. If it has been stressed, it will produce enough hydrogen that could trigger a small explosion in a confined space when a spark is introduced. Using the correct procedure for connecting cables to the battery will eliminate that (even though small) risk completely and costs nothing.

BTW, our Z4M's use a wet AGM technology that is halfway between a conventional lead-acid battery and a gel cell in terms of electrolyte solidity.

[inTgr8r]

Originally Posted by aerobod

That's the whole point - read and make your own decision!

Any lead-acid battery that is not completely sealed (i.e. has a vent tube or caps of any form) will out-gas hydrogen. If it has been stressed, it will produce enough hydrogen that could trigger a small explosion in a confined space when a spark is introduced. Using the correct procedure for connecting cables to the battery will eliminate that (even though small) risk completely and costs nothing.

BTW, our Z4M's use a wet AGM technology that is halfway between a conventional lead-acid battery and a gel cell in terms of electrolyte solidity.

would a gel cell make a better replacement?

Ignoring the light weight genre, are there any good non-OE replacements?

[mfanatic325]

Clamp the Negative (-) terminal, follwed by the Positive (+). Shouldn't cause any issues

Then when you're done, reverse order: remove the Positive (+) first, followed by the Negative (-).

[Z4Murder]

Originally Posted by mfanatic325

Clamp the Negative (-) terminal, follwed by the Positive (+). Shouldn't cause any issues

Then when you're done, reverse order: remove the Positive (+) first, followed by the Negative (-).

exactly, ground it first (-) , connect the power (+), then disconnect the power, and disconnect the ground last. safest way. just dont let the leads touch anything else while either battery is connected. i usually isolate the clamps/ terminals by wrapping a rag or something around it loosely

[Diokaef]

I take my battery of and I put inside the house. I test and charge as needed never had problems that way.

[aerobod]

Originally Posted by inTgr8r

would a gel cell make a better replacement?

Ignoring the light weight genre, are there any good non-OE replacements?

Probably not, as they are meant to be quite finicky in how they are charged, suitable only for deep cycling, as opposed to general purpose use:

http://www.batterystuff.com/tutorial_battery.html#3