Replaced 12v battery with Optima

tom1l21 · 10-24-2009, 12:22 PM

Yes that is correct, all accessories off too.

Patrick Wong · 10-30-2009, 08:27 PM

91K miles on my 2004. I decided to replace the original equipment 12V auxiliary battery today as a preventive move, as cold winter weather is approaching. This morning with temp in the high 30s F, the battery voltage was 12.2V with the car IG-OFF.

The correct battery cost $138.70 plus tax at the parts counter of Precision Toyota of Tucson. It would have cost a few dollars more at Desert Toyota, Tucson.

The part number is 28800-21170 and the battery was manufactured in July 2009. That part number is for 2G Prius that have Smart Entry / Smart Start. Base Prius use a smaller-sized battery. The voltage was 12.9V out of the box.

tom1l21 · 11-01-2009, 12:44 PM

Well I got a new Optima from Amazon and immediately took it to Auto Zone to be trickle charged. They said that on their machine, it reported a reading of a 50% charge. I let it stay there for 24 hours and when picking it up, they said the reading was a bit above 100%. Installed the new battery and works flawlessly. No more flashing/dimming lights, no weird alarm chirps, and no clicking noises. Guess the old battery needed a good trickle charge before being installed.

richard schumacher · 11-05-2009, 10:26 AM

Thanks for the update. Apparently, unlike eLearnaid, Amazon does not charge the battery immediately before shipping.

10-30-2009, 08:27 PM	#62
Patrick Wong DIY Enthusiast Join Date: Mar 2008 Location: Green Valley, AZ Posts: 4,058 My Car: 2004 Prius Model: N/A Package: #9 Thanks: 21 Thanked 213 Times in 184 Posts Friends: 44	Re: Replaced 12v battery with Optima 91K miles on my 2004. I decided to replace the original equipment 12V auxiliary battery today as a preventive move, as cold winter weather is approaching. This morning with temp in the high 30s F, the battery voltage was 12.2V with the car IG-OFF. The correct battery cost $138.70 plus tax at the parts counter of Precision Toyota of Tucson. It would have cost a few dollars more at Desert Toyota, Tucson. The part number is 28800-21170 and the battery was manufactured in July 2009. That part number is for 2G Prius that have Smart Entry / Smart Start. Base Prius use a smaller-sized battery. The voltage was 12.9V out of the box.

11-01-2009, 12:44 PM	#63
tom1l21 Senior Member Join Date: Mar 2009 Location: East Longmeadow, MA Posts: 198 My Car: 2005 Prius Model: Package: #5 Thanks: 2 Thanked 9 Times in 9 Posts Friends: 1	Re: Replaced 12v battery with Optima Well I got a new Optima from Amazon and immediately took it to Auto Zone to be trickle charged. They said that on their machine, it reported a reading of a 50% charge. I let it stay there for 24 hours and when picking it up, they said the reading was a bit above 100%. Installed the new battery and works flawlessly. No more flashing/dimming lights, no weird alarm chirps, and no clicking noises. Guess the old battery needed a good trickle charge before being installed.

11-05-2009, 10:26 AM	#64
richard schumacher Destination: Eschaton Join Date: Mar 2004 Location: United States Posts: 5,515 My Car: 2004 Prius Model: N/A Package: #6 Thanks: 100 Thanked 93 Times in 66 Posts Friends: 0	Re: Replaced 12v battery with Optima Thanks for the update. Apparently, unlike eLearnaid, Amazon does not charge the battery immediately before shipping.

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10-24-2009, 12:22 PM	#61
tom1l21 Senior Member Join Date: Mar 2009 Location: East Longmeadow, MA Posts: 198 My Car: 2005 Prius Model: Package: #5 Thanks: 2 Thanked 9 Times in 9 Posts Friends: 1	Yes that is correct, all accessories off too.