Our battery pack started going bad at 100k miles. We had it replaced this week @ 113k miles. Honda has extended the battery pack warranty to 150k miles.
But with the new battery pack comes new control firmware. The new firmware is crap. It knocked the mpg down bad. I have a 90 mile round trip commute for work, mostly hwy. My ave mpg was 54 mpg. All it took was slowing down just a tad and driving the car right. Looks like the new average is going to be 50 mpg for the daily grind.
On my hypermiling test loop of 40 miles I use to get 70 mpg out of the car. Its only good for 61 mpg now on my test loop.
Get your VIN number off the car and call your local Honda Stealership and tell them you want your battery pack changed under warranty. If your car has turned on the IMA light then the pack is bad and will be replaced under warranty more than likely. Ours turned on the IMA and Check Engine light. But all it needed was the new pack and firmware.
Be prepared to pay a hook up and diagnostic fee if it's not the battery pack going bad. The Honda rip off dealers here charge $110.00 for that service compared to my local Ford dealer only charging $39.99 for the same hook up and diagnostic service on there cars.
Also with your car setting at 108k miles it needs its 100k mile service. If done at your local Honda Stealership that could cost a ton of money. I did the service myself with all Honda OEM parts bought online.
Changed cabin air filter ( gets changed every 20k miles )
Changed engine air filter ( gets changed every 35k miles )
Changed engine oil and filter ( gets changed every 15k miles with M1 0w-20 and PureOne oil filter )
Changed CTV Fluid and filter ( That is a 3 qt CTV Fuild flush and filter. Done every 30k miles with Honda CVT Fluid and Filter )
Changed Spark Plugs ( I change them every 50k miles )
Changed Engine Coolant ( I do this every 50k miles )
Changed A/C Belt ( Had never been changed )
Changed Front and Rear Brake Pads ( Had never been changed )
Changed out about half of the fasteners used to hold in the front inner wheel wells, engine pan, and other pans under the car. Many had come loose and fell out over the years.
If you don't want to go the Honda way concerning your battery pack. And many don't cause they make the worse battery packs in the hybrid world. A company called Re-Volt rebuilds Honda battery packs to Toyota Quality.
Good Luck