Valve's Steam Deck LCD partnership with iFixit was a big moment for handheld repairability, but it looks like parts are now being discontinued. While it's currently unknown whether every component will become unavailable, the repair site says it's looking "less likely" that it will continue to stock OEM batteries.
The Steam Deck LCD part revelation was originally unearthed by Zok-Felswyn on Reddit, with a post revealing correspondence from iFixit. According to the shared email enquiry response regarding gaming handheld batteries, the stockist says "we do not have immediate plans to stock this product."