I guess till now no better alternative to xiaomi in price nad performance, safety ratio?
My friend used pineng powerbank many time during last flood, and his phone battery got problem. He says original pineng. So really need to be careful with powerbank especially circuit protection.

Do xiaomi official site always have sale with discount for powerbank? I don't really need it now.  Would love to buy when it have sale but seems unlikely?
Do you think it is easier to carry the 10400 or 5200? 5200 is much slimmer but much taller compared to 10400. Which are more pocketable you think?

Now if it also have small emergency led flashlight like some other powerbank it would be cool.