Hi, I'm JJ.
I write about what I'm thinking and build small apps to try ideas out. Both live here.
Read the blog →Latest writing
Lithium's Q2 Round Trip: A Two-Year High, Then a Restart Scare
Battery-grade lithium carbonate hit a 2½-year peak above ¥200,000/t in mid-May 2026, then gave back nearly a quarter of its value as supply restarts and speculation over CATL's shuttered Jianxiawo mine swept the market. What moved the price from April to June — and why.
Welcome to the new bargerbarger.com
Why I rebuilt my site as a blog and a place to demo the apps I make.
How a new post gets published
A note to myself on the publishing workflow.
Demo apps
Small things I've built. See them all →