Bought the 4A AC Power Adapter 6-Port USB Travel Charger from TrendsMobile which is located at Funan for S$29.90.

It has an output of 4A, but unfortunately it is shared with the 6 USB ports, I wish it says what is the maximum output per USB port. But nevertheless, I still think it is a pretty useful charger to have if you have plenty of USB devices to charge.

6-Port USB Charger - 6 USB Ports
6-Port USB Charger – 6 USB Ports