Hot answers tagged accessories
You might look at just upgrading your current approach—a lithium battery based cell phone charger (like the popular New Trent ones) generally go a lot further than AA based ones.
Probably the easiest way to fix your problem is to reduce the amount of power the GPS on your phone is using. By default, most GPS tracking programs eat up an enormous amount of battery because they default to maximum-accuracy settings. However, if you're going on long enough bike rides that you are worrying about battery life, you can probably afford to ...
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