Haley Zaremba Haley Zaremba is a writer and journalist based in Mexico City. She has extensive experience writing and editing environmental features, travel pieces, local news in the… More Info Set us as your preferred Google source Premium Content By Haley Zaremba – Apr 30, 2026, 4:00 PM CDT China produced over 80% of the world’s lithium-ion batteries in 2025 and controls roughly 90% of the energy storage battery market — a consolidation that creates serious supply chain and ge...

Kerry Wan/ZDNET Follow ZDNET: Add us as a preferred source on Google. ZDNET’s key takeaways Clearing cache speeds up a slow Galaxy Watch. Cache buildup can cause lag and drain the battery. Restarting isn’t enough, so you’ll want to manually clear the cache. Your Galaxy Watch is not so different from your phone or even a messy room. When put to great use, it, too, gets cluttered. By continually using your Galaxy Watch, regularly switching between apps and functionalities, or run...