Restoring an Optima Yellow Top Battery...kind of - YouTube
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Optima Yellow Top AGM 450CCA BCI Group 51R Car and Truck Battery - OPT8073-167 at Batteries Plus
Reviews - Optima 8051-187 - Page 2
Optima Yellow Top Dual Purpose AGM 900CCA BCI Group 31 Heavy Duty Battery - OPT8050-160 at Batteries Plus
Optima Yellow Top Battery: 31P Group Size, 900 CCA, 1125 CA, 155 Minute Reserve Capacity, Deep-Cycle D31A-1125 - Advance Auto Parts