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I own an old, 2004 model Toyota Corolla. I changed the battery previously one year back. The battery is Diehard AGM Powersport 9BS. I am taking my vehicle for engine tuning and engine upgradations to get sports performance. A friend told me that using power batt can improve the performance and lifespan of the battery. This is the first time I am hearing about it. Is it really good for the battery as it claims? How much would it cost to use it on my battery? I need your suggestions.
Thanks for your time.

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Seidal12...I did a project involving the CTEK battery chargers and rejuvenation tools.  You will find my lengthy video at: 


This information will help you understand how batteries lose effectiveness and what you can do to save or restore a battery.


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