Best wholesale supplier for Hyundai Elantra batteries?

I've been running my repair shop for a few years now, and I'm currently trying to find a reliable wholesale supplier for batteries specifically for Hyundai Elantras. I've heard mixed reviews about different brands, and I'm looking for something that balances both price and quality. The last batch I got had too many returns due to warranty issues, so I'm trying to avoid that this time around. If anyone has experience with specific suppliers that they trust, especially regarding RMA processes and turnaround times, I'd greatly appreciate your input. It's crucial for us to keep our customers happy and minimize downtime in the shop, so any recommendations would be super helpful!