I had this hockey puck for 3 months. I used it once for testing purposes. The remaining 3 months he was in the center console of my car. Today it was necessary, but it didn't work out. Have contacted the company. They told me to replace the batteries as they were probably dead. The?! Batteries have been sitting there"probably sitting down" for three months? Unfortunately that wasn't the problem. Now it's a paperweight. Don't waste your money and definitely don't count it towards saving your life in an emergency! UPDATE: The manufacturer's customer service supported their product and sent me a new one. They recommended not storing the batteries in the device as they will be depleted over time (apparently around 3 months). I haven't used it yet, but it passed the test well. I'm increasing the stars and changing the name to reflect my positive experience with the manufacturer.
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