Originally Posted by
ellyse
Sorry, I didn’t have it with me and probably remembered wrongly. Anyway, it says 20000 M, whatever that might mean. My point is still that I get through Chinese airport security just fine.
As others said, 20000mAh is fine. 100Wh is what the limit is but Chinese security may be stricter. I am uncertain if they allow 100Wh. I have been carrying two 20000mAh power banks with me without problems. 200KWh is definitely bad. If it exists, the weight will even be more than your checked luggage. It is 2000 times the 100Wh limit.