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Review title: short battery life
Product review: I really liked this product. But I am also very disappointed by the sensor. I own two of this product. The first one worked excellent for 3 months then the sensor's battery run out. So I bought the second one. To save battery this time I turn the sensor off when the first time I am not using it, then it can't be turn on anymore.I only use it for 1 hour per day. When not running, I am not wearing it at all. The sensor suppose to last for 1000 hours, but 1 hour per day for 3 month (about 100 day)-is only about 100 running hours then the battery died.The second one shows me the poor quality of switch on the sensor.
