The iPhone is using the same battery tech! I thought you were in IT?
If you're attempting to belittle me, fail, you don't know me, so let's move on. Yes, I know what they are - I am not your average internet hive-minded goober. Lithium polymer cells have been used in phones right back since the Ericsson T28 - I recall that phone & battery very clearly - aluminium panel inside with the Ericsson hologram on it:

So yep, I'd sincerely hope - being an electronics engineer (when did I say "IT"? I am, but didn't state that) I would know this, and I do... wouldn't you?