thats not a wiring issue then, maybe programming, how are you testing it, ie what are you doing to cause a full alarm. What happened when you did the bell test?
Id say every 5 years is fine. Better to replace before panels report it to prevent damage but modern panels seem to do better with failed battery's than the old dumb stuff
Don't know that page but I have lots to do on SW Web side over the coming weeks. Some features won't be available during that time but I have others planned