Good Alternative to Sbooster 12V 0.5A that is less expensive


Good Alternative to Sbooster 12V 0.5A power supply that is less expensive?

Sbooster looks like a major upgrade to 12V wall wart power supply. Seems like there are a significant number of Chinese copies to the Sbooster at of course much lower prices. I am looking at some of these. Thoughts? Or other alternatives?
donroth
Get one with a readout screen. I just offered $38 + $12 for one, was accepted and then I found one laying around so I cancelled.
A 12v Li battery. They blow the doors of any power supply regardless of price and you can get them for < $100 on Amazon/eBay 
Swagman Labs
http://www.swagmanlab.com/Linear-Power-Supplies
Quality parts, toroidal transformer, low noise. 12V is $125.

I use one on my digital. They respond to email quickly.


Thank you.  I contacted Swagmanlab.  Looks like the 12V 2A linear supply is the right one.  Sincerely, Don