Does anyone know the actual construction of the Tesla main batteries: List of questions. Maybe there is a thread that addresses these issues. How many cells ? AH and Volts per cell? How are they arranged - groupings? Fault protection - can they map out bad cells? How does the balancing happen, by groupings? What percent of battery maximum charge is used during a charge IE what is 0 and what is 100% I currently own a Lexus RX400h that has Nickle Hydride batteries. As best I can tell they only use about 70% of the battery capacity IE 0 to 100 indicated is only 70% of maximum capability. By the way my RX400h has 220,000 miles on it and I cannot tell any degradation in the batteries, probably because they only utilize about 70% or so.