Originally Posted by
cmark84
I saw some external batteries that you can plug into the iPhone. I'm thinking of purchasing one and they range anywhere from 79-129 depending on size. The $129 has the same size battery as the iPhone where as the 79 version is 30-40% of the iPhone battery size and much lighter.
Once I get my bike and have the iPhone mounted, I will see how long battery life I'll get and determine if I need an extra battery or not. I usually charge my phone at work so by time I'm home I'm at 97-99% full. I'd hope I can get more than 60 minutes with screen and GPS on.
Interesting.
Fyi, on my android phone using the gps on my phone (but with the screen off) doesn't burn nearly the battery life that using my phone with the screen on all time. I assume you need the screen on for various other reasons, just saying if you end up needing to buy a separate item for displaying cadence, that you could probably still use the iphone for tracking your route with gps and wouldn't need an extra battery. Just my thoughts.