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Old 10-03-2022, 06:32 PM   #1 (permalink)
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Join Date: Oct 2011
Location: California
Posts: 124

Padme - '08 Toyota Prius
Team Toyota
90 day: 35.93 mpg (US)
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2008 Prius Hybrid Battery


I'm at a crossroads. My 2008 Prius is approaching 107,000 miles. MPG has really dropped in recent years. My commute is shorter, but I think it also has to do with the battery aging.

I've been using DrPrius to monitor the pack and I've done the lifespan test a few times as well.

Dr. Prius reports that the Battery pack is running hot. Bottom voltage is also problem on block 5,6,7.

On my two life expectancy tests I got a 20% and a 36%.

When I step on the brakes and the regen kicks in the pack voltage shoots up pretty high, 260+, and turns red. Individual battery blocks also turn yellow and red.

Internal resistance varies but I have quite a few a 30. At what point am I going to see a pack fail.

I'm trying to decide if I want to trade in the car now and get a Volt or a Leaf. I'd rather the $1500 I would use towards a battery pack for the prius could just go towards a new car.

How can I tell if my pack is on the brink or just on the lower end. Are the grid chargers worth looking into or is a battery pack replacement more economical. Thanks.

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