This is arguably the first episode of the Batman animated series. Depending on the watch order things got all messed up, I think the actual first episode in production was On Leather Wings, but I digress.
In this episode we are introduced to Catwoman and occasional villain Red Claw. Catwoman demonstrates a unique piece of technology that you wouldn’t think was too amazing, except it can do some cool feats. Her retractable claws.
As you can see here, they allow her to climb brick buildings, which suits her career but would also greatly aid Batman in what he does.
She then goes on to use the same claws to cut glass, which would also help Batman during his stealth missions:
After this she also attacks Batman and shows that her claws are sharp enough to damage is semi-armored cape, also useful for a hand to hand fighter like the Bat:
Their utility is further demonstrated by freeing her and Batman from ropes:
And finally, she demonstrates one of the most important features, they’re retractability, after all, you don’t want to be slicing up things you just mean to grab:
He eventually does adapt this technology for the futuristic Batsuit in Batman Beyond:
But he should have done it much sooner given the advantages to mobility, stealth, escapology, and combat it would have afforded him. And her claws and gloves are sufficiently advanced in the present time that they wouldn’t have inhibited his performance at all, given Catwoman’s demonstrations of skill, agility, and dexterity.