ORIGINAL: Danh4
Here's another option
http://www.tmenet.com/products.htm#ata
I've been using their Auto Trickle Adapter for years and it works great. The best thing is that you can plug power strips into it and have up to 30 wall warts all on trickle at the same time.
Dan
Dan, THANK YOU BIG TIME for posting that link. Some years ago, they went out of business or were into some other thing. My ATA failed several years ago, but I have survived with one of their other models. Guess I never thought of looking for a website again.

You should get a commission. I just ordered two.