I bought 2. One, stopped working after about a year. When it comes on it keeps blinking. We dont know how to fix it. The other one, the battery wouldnt stay charged so I contacted the seller for another one. They sent it and it worked for about 8 months and then wouldnt keep a charge.  So I started using it plugged in all the time. Then when my husband's started doing the blinking thing, I took his battery and mine works fine again.