The company is great to work with. The reason I have 3 pair I lost a pair then found them after I replaced them( now they have service plans to help with that) and just recently up graded again. I see a couple of guys that have had trouble and I don't get it! Battery's are very inconsistent. 10 boxes all is good the next box 3 will be bad brand new and 7 will be fine. You can pay 3 times the money for less!