tom tom one

I have read many accounts of tom tom switching itself on and flattening the battery
Apparently tom tom deny that this happens
Let me assure all that this does happen
Mine switches on every Saturday at 4pm in the summer and 3pm in the winter
Assuming that it was getting a signal from something in this house ,,I put tom tom in a heavy steel safe to prevent this ,but it still switched on at usual time

So watch your tom tom--I bet it switches on at the same time every week

Anyone know why>
???