I bought three of these 7 1/2 months ago. One stopped working after five months, so I replaced it with another one I bought as a spare. The second doesn't work anymore. Counter per worker (spare) 12.9 VDC. The other two show <0.5 VDC. After the second breakdown today, I went through the listing and it says "extended" warranty for one year. However, there is no way to contact the seller even if you visit the seller's Revain store. So all I can do is post this review to see if anyone gets back to me.
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