For example, I will go on a 2-3 hour bikride using map my ride, while streaming pandora through bluetooth headphones, and my battery has died before I am done - after about 1.5-2 hours or so. I start out with 100% charge. Is this normal? What is draining it the most? Is is the gps function of map my ride, streaming music, or using bluetooth headphones (as opposed to wired).
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