There is a much higher investment with a TV. The unit isn't defective, it has a design problem. It works great for a short while, then performance drops. It would work if the circuit built into the battery box were designed differently. I have a battery in the PT that has 3 times the capacit of the battery in a stock batteryy unit. It should work well.
Kevin
Understanding the way the supply chain works is not based on the dollar amount of the item. And you say it's a bad design, I say you got a bad unit as mine as worked flawlessly from day 1, and continues to do so.
Oh, my...