Order of operations: battery replacement or OCLP first for early 2015 MBP?

I have a 13" MacBook Pro 2015, 2.7 GHz Core i5, 8 GB RAM, 256 GB. It's in good condition, except the battery has basically no life left and on Monterey it is sometimes laggy and screen will randomly go blank. I am hoping to revive it with a new battery and using OCLP to upgrade to Sequoia. My question is which to do first? I'm afraid if I do the battery first and then OCLP doesn't work for whatever reason, I'll have wasted that money. On the other hand, will OCLP work without an adequate battery? Thanks for any advice!