Yes, a failing or bad battery CAN cause the click-no-start issue, but there are several other things that can be culprits too, like bad cables, loose, corroded, or melted connections, failed relays etc....
But the battery is usually the easiest, fastest & cheapest place to start, so by all means go for it...
Having said that, I would strongly recommend you either get a trusted shop to check your battery, or buy your own tester....
Why ? because if you take it a parts store (Advanced, Autodrone etc), 99.999% of the time,
THEIR tester will indicate some problem, thereby setting them up to sell you a new battery right then & there...
trust me, I've been there, done that in the past and now just go to my local shop if/when anything pops up related to the battery....
The last battery I put in my Expy was a NAPA Gold 60 month model, and that was over 3 years ago (I also went up from 750 to 850CCA's), neveranottaproblemo
