2032 Battery you need - https://amzn.to/402kUlO

Here is a quick and easy demonstration on how to change out your dead / weak battery in your Kia / Hyundai key fob. You're going to need a flat tip screwdriver and your new 2032 coin cell battery. Use your flat tip screwdriver and pry the slot open at the top of the fob. That will split the two halves and give you access to your dead battery. Pry out the dead battery out and place in your new 2032 battery. You're all set! Hope this was helpful!

2007-2014 Kia Sedona 6B Keyless Entry Remote Fob Van Key SV3-100060235
HYUNDAI ENTOURAGE 07-09 OEM KEY LESS ENTRY REMOTE FOB VAN HATCH USA
2006-2014 Kia Sedona