Tom Rafalski made this great underseat battery mount. the battery is a Miata-sized WestCo dry-cell unit. The cable is made to mount the battery on the passenger side, but I only figured that out after I already grounded the batter on the driver side. The mount is really nice stainless steel with a CNC'd hold-down and it came with all the cabling and hardware. Watch for these at http://www.02again.com/ soon.