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Old 07-11-2018, 03:05 PM
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Question 12V battery

Have a 2007 Japanese model hybrid (VIN starts with J). The 12V battery is fading. It is a vented model, and no parts stores carry or even list the model I have. Dealers want $400 to $500 to replace (parts only). Mine has a dead cell, and starting after a couple days or more of sitting may require a jump start, which I provide with one of the smartphone-sized battery pack jumpers sold at Auto Zone, etc. I don't think this is good for the car in the long run. The battery mfr. is Panasonic. Tried looking for an Optima or other dry cell, but matching the size and post configuration is not easy. Still haven't found an exact match. Anyone know of a supplier with better prices or a workable alternative?
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Old 07-11-2018, 08:32 PM
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The Panasonic battery appears made for Toyota dealers only. Might find lower prices at internet Toyota dealers. The battery is an AGM type and supposedly deep cycle design. It appears there is no exact fit aftermarket replacement however owners are making do fine with their own non-OEM choices.

Optima Yellow Top D35, Exide Edge FP AGM25 (if you can find one) and Duracell AGM have been used along with a standard lead/acid batteries. Look around for something that has the approx same dimensions and connector arrangement.

The AGM batteries may have a vent system in case of serious over charge. Owners have managed to connect the OEM vent tube to these vents. Doorman makes various battery vent kits.

The car has a temp sensor installed on the battery case that can be transferred to the new battery. It can be removed without damage if careful.

When changing batteries. Suggest connecting a 12v trickle charger or other 12v source to the car to retain all electronic settings.
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