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#21 (permalink) Old 02-15-2008, 09:55 AM
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Default Re: Classic Prius Replacement 12-Volt Battery

My 12V battery just died last month, after 5.5 years of service. (It's not completely dead, but one morning it had insufficient juice to boot up the systems, so that's "dead enough" for me not to trust it anymore.)

I looked at the options for cheaper batteries out there, and all required some kind of modification to fit them into the mounting in the tire well of my trunk. The best choice seemed to be here:
http://home.comcast.net/~dldorrance/battery.html

That website sells a Westco Miata battery with a kit to easily modify the Prius mounting hardware to take the new battery. However, this kit costs $134 (including the battery, of course). My dealer's list price for the original battery (Toyota part number 2880021050) was only $139. I decided for $5 extra, it was worth me not spending an extra half-hour or more installing all the extra parts in the kit. Plus I could just go to my dealer and get one that day, instead of waiting for it to be shipped to me.

I installed the OEM battery in only about 15 minutes, and most of that time was spent wrestling the connector off the negative post. (The posts are apparently made out of lead, so a tightly-clamped connector can dig itself into the post.) Now I'm good for another 5 years!

Douglas (2002 Prius)
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#22 (permalink) Old 02-15-2008, 10:03 AM
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Default Re: Classic Prius Replacement 12-Volt Battery

Good info but for the class 1 Prius. I understand the cost for the batteries for the class 2 or "04" on, are quite a bit more expensive, and I believe when I replace mine it will be with the much less expensive "vented" optima model made for the Prius "2."
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#23 (permalink) Old 02-15-2008, 10:53 AM
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Default Re: Classic Prius Replacement 12-Volt Battery

Quote:
Originally Posted by hyperion
Good info but for the class 1 Prius. I understand the cost for the batteries for the class 2 or "04" on, are quite a bit more expensive, and I believe when I replace mine it will be with the much less expensive "vented" optima model made for the Prius "2."
What is the definition of a class 1 vs class 2 vs class 4 Prius?

2004 Package 7, Silver.
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#24 (permalink) Old 02-15-2008, 12:41 PM
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Default Re: Classic Prius Replacement 12-Volt Battery

Class 1 is in my definition all Prius made before the "new generation" that was released in 2004. All since 2004 have been almost identical and all are classed as "2". (In 2004, the size of the 12 volt battery was changed and has remained standard as of today.)
I have never heard of any other class of Prius made but when the "plug in's" arrive, I suppose they will be class 3.
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#25 (permalink) Old 02-15-2008, 12:57 PM
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Default Re: Classic Prius Replacement 12-Volt Battery

Usually referred to as:
C - Classic (2001 - 2003 models)
H - HSD (2004 - 2008 models)
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#26 (permalink) Old 02-15-2008, 11:11 PM
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Default Re: Classic Prius Replacement 12-Volt Battery

So, from what I gather, the 12v battery in my 2008 Prius will probably need replaced in approx. 5-6 years.
Is that right, and if so it looks like a stock replacement will run $139 +?

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#27 (permalink) Old 02-16-2008, 12:54 AM
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Default Re: Classic Prius Replacement 12-Volt Battery

No, lumpy,

That part# & $139 price was for a 12V battery only for the 2001-2003 "classic" Prius. If I remember right, the price for an original Toyota 12V battery for the 2004-2008 "2G" (2nd generation) is around $189. Somebody correct me if I'm wrong. And yes, 5 years is about the average life of a non-stressed (NOT leaving exterior or interior lights on overnight, requir'g a jump start in the morning) 12V battery.

Ken (in Bolton,Ct)

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#28 (permalink) Old 02-16-2008, 01:14 AM
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Default Re: Classic Prius Replacement 12-Volt Battery

Elearnaid now has their 2004-newer Prius 12 v battery on sale:

http://www.elearnaid.com/12vo1topraub.html

Toyota's price on the 2001-2003 battery dropped substantially since the appearance of alternatives in the market. I would not of course know if there is any connection

DAS
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#29 (permalink) Old 02-16-2008, 08:12 AM
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Default Re: Classic Prius Replacement 12-Volt Battery

I believe the expensive price is correct for the 04/08 12 volts. And Optimas vented "Gels" for the Prius are I believe $130.00
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#30 (permalink) Old 02-16-2008, 11:21 AM
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Default Re: Classic Prius Replacement 12-Volt Battery

Quote:
Originally Posted by hyperion
I believe the expensive price is correct for the 04/08 12 volts. And Optimas vented "Gels" for the Prius are I believe $130.00
Thanks to all for the replys, so I kinda know what to expect.
Is the Optima a direct replacement for the stock 12v or do you have to mess with the connectors as OP previously stated when dealing with the Elearnaid 12v.
I havent even looked at the 12v battery yet so I'm just trying to figure out what problems are going to be involved when I get to it. So far, the battery situation sounds like another "money pit" problem with the Prius (along with the HID light problem that some have had).
I don't drive very often but I understand that just sitting, the Prius draws power for the alarm and sks system.

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