just bought an r33 and noticed that the battery in the boot is just your standard type of battery. Had a similar issue with my old mx5 which has it's battery in the boot where you're supposed to used a sealed type battery. I used one of the supercharge gold batteries which are sealed calcium batteries so i think that they're supposed to run dry and have no venting. Also, they're quite cheap... i priced around and whilst most other sealed battereies for my mazda were $150-$300 these where only about $80...
I'm just wondering if anyone else uses these batteries and if so which size they use?
thanks in advance,
el