I work doing http://www.outpostcentral.com/english/index.aspx http://www.outpostcentral.com/english/index.aspx and http://www.mywildeye.com/wildeye/ http://www

I work doing http://www.outpostcentral.com/english/index.aspx http://www.outpostcentral.com/english/index.aspx and http://www.mywildeye.com/wildeye/ http://www.mywildeye.com/wildeye/ which are battery powered loggers communicating over GSM. We get years of life out of our devices. But they limit their communications and we are super paranoid about current consumption in every part of the design.