How Long Do Hybrid Batteries Last?
Some of the main points of consumer resistance against hybrid vehicles include perceptions that the costly high-voltage battery packs in these vehicles are unreliable and prone to frequent or premature failure. However, the truth is that all manufacturers of hybrid vehicles in the US domestic market are legally required to warrant high-voltage hybrid battery packs for at least eight years or 100,000 miles of use. However, ten-year warranty periods of ten years or 150,000 miles of service are now the norm on some Japanese-made hybrids, one example being late-model Toyota Prius vehicles.
Moreover, manufacturers in the U.S. domestic market are legally obliged to transfer and honor the balance of hybrid battery warranties. This requirement means that if you buy, for instance, a three-year-old hybrid vehicle with 40,000 miles on the odometer, the dealer must transfer the balance of the original battery warranty to you. It also means that the dealer must honor the remaining warranty balance if the battery fails within the remaining time period.
Sadly, nothing in this world is perfect, which means that high-voltage hybrid battery packs can and do fail for various reasons. Thus, to understand what you can do to extend the life of your hybrid vehicle’s high-voltage battery pack, we need to discuss what hybrid battery packs are, how they work, and how they sometimes fail.