Poor quality power adapter

I have been using my bedlight since April 2018 and today it suddenly crap out on me. I would never thought it would
Kill itself in 4months since I only set it to turn on from 10pm to 1am everyday.

I think xiaomi should use higher output adapter because it’s unusual to have an adapter killing itself in 4months. I tried the leftover adapter from my Philips AA charger which is rated at 12v 2A and out instantly lights up.