Smell from new UPS

I purchased a new Belkin F6C900 a few days ago. After running for a couple of hours, I noticed that the front of the case where the battery is located is a bit warm. I figured its probably because the battery is getting charged. However even after it shows 100% charged its still warm. I think the battery is constantly being charged. I also noticed some "smell" - pretty hard to describe (plastic, paint?). I haven't used this type of UPS before so I complained and the retailer replaced the unit. To my suprise this replacement is behaving exactly the same. The load is not much at all - 10 - 15 % load.

Is it normal for this type of UPS to be warm ?
Is the smell normal for new installations ?
Is it normal for the battery to be constantly charging?

Thanks.

Thanks. I decided to return the unit this afternoon. I now have an APC BN 1050 VA - no smells and working fine. No hot or warm temperature either and the software is more user friendly. I am very disappointed with Belkin support too - they don't seem to know their own product very well - or maybe they are pretending not to. I won't recommend a Belkin UPS to anyone.

Has anyone else had this experience with any UPS'?

I bought an APC BX900 UPS (XS Series 900VA) Battery Backup in early November. Per instructions, I left it plugged in for a day before connecting anything. It's fan ran continuously even when nothing was connected to it and it emitted caustic-smelling fumes. I gave it a few days before giving up and calling APC. When I told the tech support rep that I could hear the fan running after it was off and nothing was connected, she ordered a replacement unit.

The replacement arrived, the original has been sent back. The replacement is exhibiting behavior identical to the original. Fan runs anytime the unit is plugged in, foul smell emitted.

I am wondering if this is by design or a defect.

JK in LA