In my quest to shave more weight off my S2000, I am learning towards buying an aftermarket lightweight battery. I have a number of options, to include the following:

1. Spoon, 13.5 lbs, $155
2. Odyssey PC680, 14.5 lbs, $80
3. Buddy Club, ??? lbs, $127

Any suggestions?

 

buy an OEM and save the cash for something better

 

I have an OEM one...3 months old.

 

Go with Optima.

 

Optima batteries are heavy!

 

How much does the OEM one weigh?

 

Probably 20lbs or so.

 

Will buying a new battery fix the wierd idling problem I get sometimes when in neutral with my foot on the brake and clutch at a signal light? It seems to idle down and the shift knob shakes a little bit when I so idle abnormally like the engine is about to die.

 

And have suffered from some really shitty performance issues lately.

 

It's not your electrical system that's causing this. It's your ECU having a brain fart when conditions change. Give it a chance to learn without you using the gas to "help" it when it dips down like that. If it doesn't learn after a few episodes then start looking for fixes. And the fix won't be a new battery.