I picked up a Yellow Top Optima for my upcoming system in the car, and pulled the stock Panasonic battery out tonight. I figured I see if any of you guys are needing a new battery before I take it back up for the core swap. PM me with any offers.

 

Hate to tell you buddy, but the Stock Battery on the S2000 is one of the strongest batteries Honda puts in their cars. I had one of the Optima yellow tops, and from my experience...I had to swap three of them within a 2 month period...I think they're junk....you might want to hang onto the stock battery. Keep it off the floor.