I still have a Caterpillar Tractor branded rugged phone. The actual maker, Bullitt, a UK company, went bust. The rubber cover over the USB charging port was the

I still have a Caterpillar Tractor branded rugged phone. The actual maker, Bullitt, a UK company, went bust. The rubber cover over the USB charging port was the weak point, and I had two of those wear out. The batteries swelled up in two units because the phone spent most of its time plugged into a charger. Good idea, bad execution on the details.