I have a gen 3 carbon x1 that is four years old and I still use it every day. Never replaced the battery and I still get 4-5 hours. It’s not powerful enough for

I have a gen 3 carbon x1 that is four years old and I still use it every day. Never replaced the battery and I still get 4-5 hours. It’s not powerful enough for dev work but perfect for web stuff and office.