Got the Powerocks Stone 3 which is a 7800mAh Dual USB Power Bank from my cousin in Hong Kong. I am not too sure of the local retail price, but on Amazon, it is retailing for US$48.50 (S$62.50).
As the name “stone” implies, this power bank is pretty heavy (like a stone) due to the 7800mAh battery and it weighs 500g.
