Thinkpad Suggestion

Hi!, im planning to buy a thinkpad to use as my secondary pc (lightweight, good battery) for uni, cause i was using an s6 lite, it went bad, and taking my principal pc feels too much (aside that is kinda heavy, big and the battery life is 45 minutes if im lucky)

Mainly lightweight workload (PPTs, Docs, OneNote)
So, do you have any recommendations? I was reading that the T470-490 are a good cheap option, or the X270, also i know that there are some touch models.

For reference, where i live an used x270 is around 200.000 CLP (190 US dollars), T480-490 are around 190-220 in good contition.

Note: English isn't my primary language, so i apologize for any typos.