MartyB replied:

I mounted two coupled together as my auxilary battey & mounted them under the bonnet. They are still working fine two years later, no problems at all.
from Marty.

Gajm (VIC) replied:

I have just purchased a couple of AGM batteries, and one now lives under the bonnet. It hasn't been there long enough to give you any information about its life, but on the recent trip to the corner they were both performing beautifully, better than any deep cycle battery I have had and I doubt I will go back to deep cycles again.

There was one day where we really gave the AGM on the camper a hiding, with the freezer running, then recharging the laptop after downloading some pics, and the kids watching a dvd, and because we had left the Camper for the day the solar panel wasn't out. It got down to 11.8V so I hooked the car up to it for 30 mins, which took it up to where I was comfy with it to stay overnight. I am told they can go much lower than 11.8 but I am still used to deep cycles and didn't want to get silly about it.

kiss'n'dirt replied:

AGM batteries are prob the toughest of all batteries. Just stick it under the bonnet, it's good for it. My mates bro works for a battery mob and that's how i got mine so cheap.

You can mount the AGM upside down if you want. Won't matter it

tiger60 replied:

Thanks for the fee-back fellas, i think i"ll take a punt and give the AGM battery a try.
tiger60