I just returned from a flight out of Beijing's Terminal 2 where I had my portable lithium battery charger confiscated from my hand held luggage. Even though I had the paperwork to support that it was less than 100 WH it was still taken. They showed me their restrictions contained in a 3 ring binder and it didn't jive with what I saw on line. I had mistakenly left my charger in my checked baggage on the flight out of Terminal 3 to Mongolia and didn't remember it until after clearing visa inspection. Fortunately my bag arrived on time with the charger still inside it. I know others whose bag arrived several days later with the charger gone and a note saying the charger had been taken.
Several months ago why flying out of Ho Chi Minh City on Korean Airlines I saw others who had their checked luggage pulled from the flight who were carrying lithium chargers in their bags. At least there one could watch the luggage go through the screening process and immediate address the problem.