SyncUp & Drive kills batteries/alternator

Good morning,

I am currently posting on this thread due to the fact that, I have purchased two sync drive devices in the past year. I added them to my BMW and Honda, Originally my concern was the notifications of disturbances were really slow. Then this past year soon after i connected the device to my BMW my vehicle died on me and would not turn on, my alternator and battery died, i did not think anything of it. I traded my BMW in for a Toyota highlander that same week of the malfunction. At this point friends and family suggested it might be the Sync drive, I looked past the comments. Sure enough this past December my Honda civic began to have electrical problems starting my vehicle, battery was recently new, and i also had to replace my alternator and starter at the same time. I have been maintaining my vehicle well, and this was unfortunate. The reason why i am writing this comment due to the fact that my vehicle needs to be inspected by today, and sure enough when i take it to the Inspection location they are unable to initiate the inspection due to my car not being able to turn on unless the Sync drive is connected. I contacted the T mobile support number and no one has answers for me, at this point I have lost my patience and am frustrated being that i have been paying for this service and devices and both of my cars that i utilized these devices on, have had issues that are in fact costly. I really need answers, I looked past all the trouble shooting aspects of the device being that i can live with minor, but having my second vehicle die on me this is outrageous and i refused to let this go without any answered or clarity.