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Hello. Welcome to Just Answer. Please allow me to assist you. The normal life span of a Prius auxiliary battery is 3 years. No matter how good you treat the battery, 3 years is the normal replacement window. If the battery needed jumped, and there was no electrical draw causing the battery to get weak, you would be best advised to replace the battery. If you do not replace it, you will continue to have to jump the battery sooner. If you have any questions, please feel free to reply; please do take a moment to confirm you have received my input. Thanks.
You can do not better than a genuine Toyota dealer parts dept battery. It has a great warranty and is designed for YOUR car. Not a generic 'fits-all' battery from an auto parts store.
I have had little long-term success with Exide products. The dealer battery is better because it is designed for the car. Non-Toyota batteries are generic it-might-fit-and-it-might-work. I have had customers decline Toyota batteries and install a generic battery, only to come back 6 months later to purchase that what was recommended. The Toyota battery warranty is very, very good. Go for the Toyota battery. I would replace the battery at this time if I were you.
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