The output from the powerbank is 1mA. It's pretty standard unless u find those who can give u 1.5 or 2mA outputs and due to the capacity of powerbanks, charging them usually will take quite a while.

im using the black transformer one on the right. that is the only power bank i have, and have been using it for the past few months. it does the job, but if anything, i wish its smaller. now its bigger than the phone.
but bigger capacity = bigger size. so no choice.
bro you cant exactly compared it to the speed of charging from wall plug. its portable. just leave it there and charge while you do your own thing. can bring it everywhere anyways.

Yes ur powerbank is normal. Unless your powerbank is fake which can explode, I dont think it will damage your battery.

So, Yoobao is the best?

no wonder it's cheaper than some other brands like Anker. Anker is using lithium polymer for some of their models. does yoobao come withany model tht is polymer based? 

It is original, I bought from China retail store.
Just that seller in garage sales mark up the price only.

Yoobao Transformer is around RM70 only.