The backside of Z770 has to be one of the dullest I’ve seen in a long time. It’s plain, it feels cheap and it looks like the designer spent all his/her time on the front design. Apart from that, the battery cover is extremely creaky, and it’s almost impossible to use the Z770 without it creaking.
The left side of the Z770 houses the Fast Port connector, while the right side is home of the volume keys and a Memory Stick Micro (M2) slot. I personally would have preferred swapping the location of the volume keys with the Memory Stick Micro slot, but this is not possible due to a - in my eyes - major design flaw.
There’s nothing in either the top or bottom of the phone.
Behind the battery cover is located a standard BST-38, lasting up to 340 hours of standby, or 8 ½ hours of talk on GSM networks. I could generally squeeze out a good four days of normal use of the battery. This sounds quite reasonable.