Ref Bio Cell — Minecraft block

Ref Bio Cell is a renewable biofuel item from the IndustrialCraft 2 mod for Minecraft. Players make it by refining a Bio Cell in an Extractor, turning processed plant matter into a compact fuel cell. To start the chain you craft a Bio Cell from an Empty Cell and compressed plant material, then run it through the Extractor to produce the Ref Bio Cell. Six Ref Bio Cells fill an Empty Fuel Can in a Canning Machine, and the resulting filled Fuel Can burns in a Generator to supply EU energy.

Because the cells come from farmed crops and other plant matter, Ref Bio Cell gives IndustrialCraft 2 bases a fully renewable power source independent of coal and other finite fuels. Note that the official IC2 wiki marks this cell-based chain as outdated: in IC2 Experimental the Empty Cell was replaced by the Universal Fluid Cell, and the current biofuel route turns plants into Bio Chaff in a Macerator, enriches 1000 mB of water into 1000 mB of Biomass in a Canning Machine, and ferments the Biomass into Biogas. Ref Bio Cell remains part of the classic system, found mainly in older modpacks.