The price of fossil fuel accompanied by an increasing awareness of environmental problems associated with global warming. resulted in an upsurge of scientific activity to identify and develop environmentally friendly sources of electrical power. In this sense. direct energy conversion by thermoelectric devices using residual heat as heating source. https://www.spidertattooz.com/Metabo-HPT-NT1865DMASTM-18V-MV-15-Gauge-Brushless-Cordless-Angled-Finish-Nailer/