tag:blogger.com,1999:blog-8701415274122206892.post3829139650345516885..comments2022-12-13T06:45:41.012-08:00Comments on andy jennings: solar iphone charger for bicycle touring: not as simple as I thoughtAndrew Jenningshttp://www.blogger.com/profile/14257091151841126161noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-8701415274122206892.post-88539083005392014422017-03-08T22:31:13.507-08:002017-03-08T22:31:13.507-08:00This comment has been removed by a blog administrator.Anonymoushttps://www.blogger.com/profile/02783711469595338625noreply@blogger.comtag:blogger.com,1999:blog-8701415274122206892.post-47603100415748651672013-02-03T16:53:09.295-08:002013-02-03T16:53:09.295-08:00I now ride a Vivente World Randonneur with a dynam...I now ride a Vivente World Randonneur with a dynamo on the front hub. I find that one day's riding will charge battery enough for a week of using the iphone, including playing music and taking photos. Andrew Jenningshttps://www.blogger.com/profile/14257091151841126161noreply@blogger.comtag:blogger.com,1999:blog-8701415274122206892.post-7458506180269140372011-03-21T11:51:23.646-07:002011-03-21T11:51:23.646-07:00My understanding is the iPhone expects a charger t...My understanding is the iPhone expects a charger to comply with the USB battery charger specs whereas many cheap power supplies just provide 5V on the power pins and hope for the best (which to be fair often works). What your 3rd party cable will be doing is shorting the data pins (with some resistance between them) so the iPhone detects your battery pack as a compliant charger. Google will find you the circuit diagram if you are interested.Andrewhttps://www.blogger.com/profile/17438579408622914818noreply@blogger.com