Originally Posted by
rdtompki
Johnny, I listen to audio-books via Bluetooth on some of my long rides. I carry a high-capacity external battery which extends phone "life" by 3X or so. These units are inexpensive and probably only weigh 1/3 of the phone, itself. It's a good backup to have even if you don't keep it connected in the event you run your phone down.
What external battery do you have that triples the life of your smartphone for 1/3 of the weight? I have one, but it is as big and heavy as the phone itself and most of the others I have seen are twice as big and heavy as my phone (too heavy for a jersey pocket). My Android phone is already fairly big and heavy.