1 watt hour = 1 ampere hour * 1 volt
A = 10400ma = 10.4ah, U = 5.3v (actually 5V).
w = UA = 10.4 * 5.3 = 55. 12Wh
First of all, I can tell you for sure that high-quality mobile power can be brought on the plane. Because the booster board of the mobile power supply will consume electricity at any time and generate current, if the current is large, it will not pass the security check. If the batteries are separated, you can take them with you.
For everyone's safety, we must act according to the regulations. If you want to bring a lot of mobile power, you have to check it. For individuals, only one or two mobile power products can be carried at a time, and three may not be allowed.