The battery cartridge health.
  bit 0 Battery lifetime okay
  bit 1 Battery lifetime near end, order replacement cartridge
  bit 2 Battery lifetime exceeded, replace battery
  bit 3 Battery lifetime near end acknowledged, order replacement cartridge
  bit 4 Battery lifetime exceeded acknowledged, replace battery
  bit 5 Battery measured lifetime near end, order replacement cartridge
  bit 6 Battery measured lifetime near end acknowledged, order replacement cartridge