Dnarturo

Hey I found all of them.  I didn't know it was hard so I wasn't keeping track but I roughly recall where 4 are: 
 
1) From the windmill in the courtyard near the town entrance there's a bunch of little creatures running around, go up the small stairway to the engine room and fight the monster inside.  There's a bookshelf to examine with a battery component.  (Its the same monster as the one below the steps where the community kitchen is.)
 
2) The other hard one was randomly on the ground on the railroad tracks towards the end of town.  Keep examining stuff along the tracks and you'll find it. 
 
3) Power cables are found examining one of the carts. 
 
4) One of the monsters has one (as listed above) 
  
Hope that helps, though someone needs to confirm #2 and locate the 5th one.  Next time I play I'll keep better track. 
 
R/ 
Dnarturo