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broski499 · 10-03-2022, 07:32 PM

Greetings,

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.

10-03-2022, 07:32 PM	#1 (permalink)
broski499 EcoModding Apprentice Join Date: Oct 2011 Location: California Posts: 129 Boltar - '19 Chevy Bolt LT Thanks: 99 Thanked 24 Times in 18 Posts	2008 Prius Hybrid Battery Greetings, 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.