Bests & Worsts Reviews from Amazon

I bought 3 of these. 30,000 mAh is 30 Ah (for reference). My MacBook Pro battery has a 4278mAh battery. From complete 0% to 100% this battery pack should charge my MacBook Pro more than 7.0126 times. But it only charges it to 100% 1 time, and then gets to about 70% the 2nd time before it is dead. The description says it will charge an iPad Mini 4 times, but at 30,000 mAh. it should charge it more than 3x's that amount of full charges. All 3 of these that I bought charge/discharge exactly the same. For reference I have a 20,000 mAh pack and it charges my MacBook Pro 4 times fully, with enough left for my iPhone and iPad before dying. So, like many other batteries on this site, 30,000 mAh is not truthful. *I bought a battery a few months ago that claimed it was 26,800 mAh, and when I hounded the seller because I knew that was not possible, he immediately took the product down and told me it was actually 8000 mAh. You have to be very careful when buying, as sellers will put whatever they want in the description, and that stinks. All 3 of these are going back.