[lincpimp]

Seems like he is using the dc to dc convertor to get a constant voltage thru the entire discharge cycle. I do agree that it adds complexity and has potential to lower effecientcy. Not sure if the lower load that the 6s pack will see may help cells such as this handle load better thus extending their lifespan and cuasing less voltgae drop under load. Might be as or more effecient than just running lower voltage. These are 2c cells, keep that in mind.