Quote Originally Posted by rebeccaC View Post
Remember that using the iPhone’s GPS function uses more battery power than normal even when being used in the background. ?
You might consider getting a portable battery recharger to take with you. I have one that I connect to my iPhone while I am riding. Mine has a usb connection so I just connect my iphone to it via my iPhone recharging cable. My iphone is mounted on my handlebars via a handlbar mountable case, the recharging cable then runs out the case and then connects to the recharger which I have in a bento bag.