On Sunday, April 20, 2014 4:10:24 PM UTC-4, 7C wrote:
On Sunday, 20 April 2014 20:09:52 UTC+1, Ramy wrote:

And you can always carry a smal external battery.



I wonder how many XC pilots carry external battery for their cell phone in case of landout? Otherwise you likely going to run out of your smartphone battery just before your crew arrives.


Carry a 12v-5v converter with usb out, wired with same connector as your glider battery. You will almost always have some capacity left which is not useful after you land... Computer shops have 3 in 1 usb cables with multiple common cellphone connectors. Mine has samsung, iPhone 4 and 5 (I can even offer charges to other pilots in the same field).