Replacement Battery Question

One of my PS5 controllers is now always saying the battery is almost dead. Works fine with it plugged in and charging. I am assuming i need to replace the battery. Does any have a recommendation where to get one. Amazon, IFixit Ebay?

I’ve had good luck buying broken or droid y controllers on eBay, look for a (1A) controller as the battery will be newer, I shoot for less than $20 shipped and part some of these out. I don’t know where to get new batteries but this is what I’ve been doing.