9V Battery Charger for 2 Batteries

Convenient to be able to charge two at a time

basic charger, I like that it chargers 2 batteries at once, but no indication if batteries are fully charged and it doesn't have a UL listing on the device so I don't leave it unattended

Won't charge half the time.

The battery charger appears not to be working. I plug it in and nothing happens. I have tried several different outlets and nothing. IT does not light up at all. I need to return.