Refurbished ThinkPad X13 Yoga Gen 3 for $500 with 1 year warranty - good choice for grad student?

Hey all, I know nothing about computers and am completely lost. I need something lightweight with a reasonable battery life (6-8 hrs) for writing, reading/annotating PDFs, etc. Nothing wild like gaming. I'm hoping for a computer that will last for years so long as I treat it right. Is this a good choice? Thanks.