Thanx for the info seem realy easy to build,
The thing to google for was "powerpack usb".
After som googling I found a premade one (swedish site, but the picture "says it all") costs about $9http://www.kjell.com/content/templates/shop_main_details.aspx?item=31779&path=470000000,480000000,492000000,494000000
Ill probably buy a premade consider to smal price and nice package, it will probably have the DCDC stuff included.
I also found this (and a few others like this one with internal battery)http://www.lenmar.com/Web/ProductDetails.aspx?ProductID=PPU2100B
Just Mobile has one that has 4400mAh but it "starts to" get expensive, but that will
probably give you a few charges.
So now it just a matter of finding one that gives me most mAh for the smales amount of money, how may mAh do you get from your 4*AA batteries? Has anyone any experinces on whats brands are good?
I think it would be nice to buy an extra USB cable for the watch and make it shorter, (like 5cm).
or wait to see what Globalsat has to offer in the near future, it seem like a batterypack was on the new items list in another thread.
How do you handle the "charge" in process, do take off the watch and plug it into the cable when it needs charging (and that put in you belt or bag or someware during the charge process) Or do you have it attached to the charger cable the whole time?
How long do it take to charge it?