Removal of the aircraft battery can result in loss of power to any clocks that are electrically. It will usually be necessary to check and reset the clocks on the flight deck when battery power is eventually restored.
When no other power is on the airplane (B777), the hot battery bus supplies power to the static random access memory (SRAM) of the AIMS. If you disconnect the main battery with no power to the AIMS cabinets, you lose some data.
EXERCISES FOR BETTER REMEMBERING THE TOPIC 
I Listen and repeat the pronunciation of the words. Find the sentences with
