That’s right folks. The PiggyPower Ember is so sensitive to temperature difference that simply placing it in a bowl of hot water can be enough to start producing usable power. That means charging a phone, running small lights, or powering simple USB loads from heat most people would never even think twice about. This is the whole point of PiggyPower. Heat is everywhere. The problem is that most of it gets wasted. The PiggyPower Ember was built to take that heat, create a temperature difference,