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Belt Alternator Starter (BAS)
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The Belt Alternator Starter or BAS-hybrid vehicle is a new trend in hybrid vehicles mostly backed by General Motors. Rather then have an expensive full hybrid system in a vehicle for maximum fuel economy a relatively cheap BAS can be added to a vehicle line to make modest consumption reductions for a much lower price.
Hybrid advocates find this half step technology worrisome as they would prefer every car on the road to move to the full system.
