batts from old laptop. the one on the left still has 3.4v and the ones on the right have low voltage but twhen i measured resistance it read below 50, but it ramped up. should i reuse them or just buy new LiPO4. im tempted to make a UPS for my cctv and router

https://www.youtube.com/watch?v=KQW-hUJ49eM&list=PLE7E5EMjOqksr1tOfCBecJuFP-nHI0-Nv