The battery is garanteed for ten years no mileage in The US. Per government regulationSo sorry to hear about your AC issue. My Niro just died, they say it is the whole hybrid battery and BMS system... but this last week the AC was not running cold anymore. I wonder if it was a similar issue to you. Please let us know more about where you found the part. The dealership wanted almost $8,000 for the battery, I found one at a salvage yard for only $1500.