He's pretty much right, Honda did a good job with the controller and user interface so you don't see much difference as the battery ages. Without a device to view the otherwise hidden operational parameters it's hard to tell.
That said, there may be some signs if the pack is getting really tired such as failure to hold a charge when the car is sitting, weak charge or assist, frequent recalibrations- although sometimes symptoms that appear to be from the IMA battery are actually from a failing 12V battery. Fortunately that's easy to fix.
There are readily available inexpensive ($100) Chinese clones of the Honda HDS diagnostic tool that you can use with a Windows laptop, these give access to all of the car's systems including the IMA.
That said, there may be some signs if the pack is getting really tired such as failure to hold a charge when the car is sitting, weak charge or assist, frequent recalibrations- although sometimes symptoms that appear to be from the IMA battery are actually from a failing 12V battery. Fortunately that's easy to fix.
There are readily available inexpensive ($100) Chinese clones of the Honda HDS diagnostic tool that you can use with a Windows laptop, these give access to all of the car's systems including the IMA.
