Finally Asus are seriously intend to resolve the half cook RT-N13U router after one year. Hope it will not take another year to stabilize the router. Previously l have complain to Asus Malaysia and Taiwan Asus, yet nothing have being done to solve the problem. Voicing  the problematic products in a public forum finally works.

Big  thank ASUSmy on seriously trying to help all those who are frustrated users of RT-N13U.
Could not be cheaper than others, It's just affordable, due to the brand name "ASUS".  I have another non Asus brand router on Unifi operating 24/7 without DC  or hang for months purchase at a price of RM 88.00 at Viewnet.