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In the normal condition, we place our portable chargers in bags when charging. But when exercising, we would not take bags with us, especially heavy portable chargers in addition. However, we usually bring cell phones with us by the reason of relieving our boring time when jogging or bicycling. Using them, we can not only listen to music, but rely on its function of automatic navigation. Then we have a problem, wasting of electricity and how to charge them because we can’t always take cell-phones in and out of our bags repeatedly.
W Power Bank can solve some problems.
W Power Bank
．Light and convenient
．Comfortable for exercising
Taichung University of Science and