TM   11-5820-890-10-1 BATTERY  PHYSICAL  CONDITION  (manpack,  vehicular  dismount) Item no. When B A 1 PROCEDURE a.  Refer  to  warning  pages  in  the  front  of  this manual. b.   Visually   inspect   battery   often. c.  Replace  battery  if  you  smell  an  irritating  gas, or  hear  a  hissing  or  burping  sound. d.  Touch  battery  compartment.  if  it  feels  hot, allow it to cool for at least 1 hour; then replace battery. Equipment not ready/available if:  (See  Maint) Smell  irritating gas:  hear  hiss- ing  or  burping. BATTERY  ELECTRICAL  CONDITION  (manpack,  vehicular  dismount) When Item no. B l A PROCEDURE Equipment not ready/available if:  (See  Maint) 2 a.  Set  the  battery  life  condition  if  you  have  a used battery, or have brought the RT function out   of (See Chap 2, Checking and Setting Life Condition of Primary Battery.) b. Set FCTN to SQ ON. c.  Press  BATT  and  read  the  displayed battery  life  used. d. If display showed 11 or higher in step c; re- place  battery.  (For  combat  and  critical  mis- sion  operations  only.) e.  Check  and  log  battery  life  condition  if  you are  going  to  set  FCTN  to after com- pletion  of  PMCS. Display  shows  11 or  higher. HUB ELECTRICAL CONDITION (manpack, vehicular dismount) Item no. 3 When B    A l PROCEDURE a. Press FREQ. b.  Watch  HUB/LOW  display.  If  diamond- shaped light flashes, HUB is weak. If light is steady, HUB is extremely weak or missing. c.  Replace  HUB  if  display  Is  as  described  in step b. (See Chap 2, Removing and Chang- ing Hold Up Battery.) Equipment not ready/available if:  (See  Maint) Diamond-shaped light flashes or is steady. 5-3