I was given an OLPC laptop as a gift, and learned that their CMOS battery (If I remember correctly) was hardwired, and when the battery died the laptop was useless. I sent my OLPC to someone on a forum who claimed to fix them, along with a fee, and never heard back. The only time I’ve been screwed by someone on a niche forum like that.

Still, it was a fun thing to play with. The form factor was like a durable OG iBook, and it worked well for basic tasks.