I can get a 10000mAh LiPo battery from at around 9 USD from China which I think it is pretty much the same as those from Amazon.
I have the same issue.
First, Omega do not support 802.11ac, so please connect to 2.4GHz
Second, Please use AES
Third, please change option ht '20' to option ht '20+40'
correction, should be '20+40'
yes you can connect hidden SSID by changing option ht from '20' to '20/40'