The Yellow top D34 Optima battery is great for Off Road Race cars especially when electrical loads are sometimes higher then the Alternator can supply. These are also great in tow vehicles as a second battery to run work lights and other accessories at the track
 
Key Benefits
Deep-cycle and cranking power
Up to 3X longer life
15 times more vibration-resistant off road
Virtually spillproof
Mountable in virtually any position
Maintenance-free
Faster recharging
Optimal starting power
300+ discharge/recharge cycles
750 CCA