Bumper = better battery

Givmeabrek

macrumors 68040
Apr 20, 2009
3,393
1,053
NY
If the signal is weak or weaker with your hand on the antenna then it will use more battery life.

Your link isn't working so I can't see what you are showing.
 

Certinfy

macrumors 6502a
Jan 29, 2011
933
0
London
Come to think of it I just put my bumper on a few days ago and have also noticed better battery life.
 

Prof.

macrumors 601
Aug 17, 2007
4,851
614
Chicago
Why do you include a Geolocation in all your posts?

Any who, I wouldn't say I notice improved battery life, but I do notice that I almost always have full service when I have a case on my iPhone compared to not having a case.