ABSTRACT Areca coir charcoal and palm shells charcoal are biomass waste that can be utilized as an alternative energy source in the form of charcoal briquettes as a substitute of fossil fuels because they contain lignin and cellulose. This research aims to get the best ratio of areca coir charcoal and palm shell charcoal briquettes, referring to SNI No. 01-6235-2000. The research was implement…