Got an aluminum battery door for my s4 today, surprised since it came in so quickly. It does give the device a bit of a bulkier, but premium feel, you definitely notice the weight difference too. Not sure if I'm going to keep it on as I did like the lightness of the device and the slimness, but it does definitely make it feel more premium. Also with this battery door on my Slim Armor case won't fit anymore, so that gain of bulk may prevent cases from fitting properly. I got it from this vendor on ebay and they ship fast. The product itself is pretty good for what you pay, but I'm not liking it as much as I thought I would. Plus the aluminum backing seems to be coming off the plastic already and mine came with a pretty prominent scratch on it. It does look very good though. This is the grey door for those interested: Full Brushed Metal Aluminum Battery Door Back Housing Cover for Galaxy S4 I9500 | eBay And pic of the scratch. In the process of getting a refund as I'm not sure I really like it. Update: they're sending me a brand new door tomorrow. I have to say they have excellent customer service and quick shipping as it comes from Hong Kong, it took 5 days to get here.