system
Given the following post, respond as if you're commenting on Reddit:
human
[Iron Man 2] Why didn’t Tony Stark use an external power source?

In Iron Man 2 we learn Palladium is poisoning him. He was searching for a replacement and couldn’t find one until the end of the film.

My question is why didn’t stark do what was done in Afghanistan. Connect an external power source to his heart so while he searches the poisoning is slowed down?
gpt
It would compromise his ability to be Iron-Man. He couldn't be in the field if he's connected to an external battery on a desk.

To him at this point, Iron-Man is worth it. He is the only hero on Earth at this time, he has "successfully privatized world peace". If he goes away then it all comes undone.

At this point, Tony thinks without Iron-Man he's useless. He says it in the hearing, he & the suit are one.