In its basic configuration the GOS battery pack contains four lithium-ion cells providing a battery voltage of approximately 7.4 V. The batteries are sealed in epoxy resin and are housed in an aluminium case, making them resistant to the harsh conditions in space.


  • High energy density through the use of prismatic cells
  • Flat space-saving design
  • Low temperature sensitivity due to the high thermal mass of the construction
  • Flight heritage from multiple missions
  • Can be supplied with four, six, or eight cells
  • Fully compatible with PC104 format