Thats curious - I have several chargers - Ice, Team Checkpoint 1030, Hyperion 0610iNet, Piranha digital, GT Power A-6-10, and a Turnigy Accucel-6. There is no mention on any of them of a UL, ETL or etc approval. The Hyperion mentions it is RoHS compliant, but nothing else is mentioned either on the case or in the instructions.
Like said, you've got a decent charger, yes its cheap. Its had good feedback here, no one is reporting the kind of probs you seem worried about.