In difference to the original Turtle Rover battery I run a custom battery pack in a 6S3P configuration of Samsung 18650-35E cells. That’s 22.2V/10.2Ah in total. The brand new, yet to be released, Texas Instruments BQ40Z80, a 2 to 7 series battery pack manager with impedance track gas gauge, takes care of the entire pack. Its protection and balancing features guarantee safe handling of this energy source. The SMBus interface allows readout and indication of all battery lifetime parameters in the Rovers mission control software.