I replaced the battery in my GPS anntena but it still pined a 69 MPH with the power on or off. What could be the problem?.

Go to livorsi website and open the PDF troubleshooting link for basic diagnosis. But sounds like you have to send it in for a bench test. Just sent mine in yesterday after deciding njot to mess with the battery change myself.

you CANNOT replace a battery and expect it to work. I went through the whole thing recently. I replaced the battery and it still did not work. It has to be recalibrated and the battery will just die again in a couple of years. Now livorsi is not even replacing batterys, but the whole sending unit. So I just bought a new batteryless antenna and was done with it. Livorsi will give you a $30 credit for you battery type antenna on trade in.