I have just received the Incipio OffGrid battery case for my iPhone 4 and it is amazingly slim and feels great (matt black rubberised) It doubles the battery life of your phone which is great if you are away from a mains/usb point, and it also makes it more comfortable to hold. A bit like the 3G with a rounded back.

If you have an iPhone and hate the terrible battery life, a case with a built in battery case is a great option, but they are often very bulky and heavy. I did a fair bit of research until I came across this one and it is barely bigger than a normal case protector.

I know if sounds like an advert, but after hunting high and low I am very impressed with it. I got mine on Amazon for about £30! If anyone has any other suggestions I am all ears, but I thought I would let you all know of a good one. Tom

Current Drive
2011 4.4 TDV8 Autobiography - Santorini Black - Ivory Leather

Previous Drives
2004 Model Vogue Td6 (Touchscreen) - Java Black - Parchment Leather
1994 RR Classic 3.9 V8 Soft dash - Niagara Grey - Grey Leather
1972 Series III SWB Safari - Green (Hand Painted) - Black Plastic

Guess you mean this one

http://www.zdnet.com/blog/mobile-news/inci...eview/7199

http://www.amazon.co.uk/gp/product/B005CNK...00_s00_i00

Yep that is the one, the matt rubberised black gives more grip and IMHO looks better than the gloss ones. You can get it in white too. Tom

Current Drive
2011 4.4 TDV8 Autobiography - Santorini Black - Ivory Leather

Previous Drives
2004 Model Vogue Td6 (Touchscreen) - Java Black - Parchment Leather
1994 RR Classic 3.9 V8 Soft dash - Niagara Grey - Grey Leather
1972 Series III SWB Safari - Green (Hand Painted) - Black Plastic