Not sure. I run my ST4121 on cigarette lighter power. The WxWorx
receiver runs on cigarette lighter as well.

Most BT GPS have an integrated battery that is good for 10+ hrs on a
charge, but I would get one that runs on cigaretter lighter as well.


On Sat, 11 Jun 2005 22:33:36 -0400, "Victor J. Osborne, Jr."
wrote:

What the battery requirements for all these bluetooth devices.


If I was starting over, I would spring the extra for an ST5121, which
is the latest and greatest from Fujitsu. The ST512 integrates
bluetooth. The latest WxWorx receivers are bluetooth enabled, and
bluetooth GPS receivers are easy to find, so this would greatly reduce
cockpit cable clutter.