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Having to replace trunk battery

So I found out I have a bad cell in my 12V battery in the trunk. My wife brought it to NTB and they tried to replace it and said they could not get the battery back in and that I had to go to the dealership. I have put in many car batteries but never in this car. Everywhere is closed now so I cannot get one to try to put it in myself. It looks pretty straight foward though. Is there something I am missing? Anything special about putting in that battery?
 

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b/c of the placment of where the battery is in the back of your car some batteries physically won't fit. nothing really special about putting it in. i believe your owners manuel has how to do it (don't quote me though).

how old is your car, dealerships have a pro-rated warrenty on their batteries, i believe its free for 3 yrs/ 36k miles, than every year or 12k miles its pro-rated (ie they pay x% you pay y%) and the ratios change based on age or mileage.
 

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Toyota uses a special non gassing deep cycle battery for the 12 volt in the trunk. You don't want a batter that gasses hydrogen and oxygen in your trunk. A spark could cause a significant boom. The Optima D34M Blue Top should be a good replacement choice. However, you should measure your space and compare it to the battery specs to confirm. In the 2012 it should fit, but will be longer than the original. It will depend on your mounting brackets.

The trick of replacing it is to use two wires to solidly connect the terminals of the battery leads to the new battery before you disconnect the old. Positive to positive and negative to negative of course. After you have a solid connection disconnect the old battery and put the new one in place. Then make the permanent connections. The idea is to not leave the car without a 12 volt supply during the changeover.
 

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i think the optima battery is a little too big. the hybrids have small batteries since they only run the accesories in a hybrid. (i believe Mg1 starts the car and uses the hv battery not the auxilary one), so b/c its small and where it is in the trunk i'm not sure what battery would fit besides oem. i'd measure like ron AKA suggested. best way to see what will fit. also ron is right about the type used and you really don't want an aftermarket battery venting into a inclosed space. i know the prius batt. have a vent hose that you hook up that routes outside the trunk, i think the camry;s have the same thing.
 

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i know the prius batt. have a vent hose that you hook up that routes outside the trunk, i think the camry;s have the same thing.
There is no vent on the 2012 TCH battery. They use a sealed AGM or Gel battery that does not gas. The Optima is an AGM. The yellow top is designed for starting and is intended for conventional auto starting service. The blue is for marine, and depending on the specific model designed for deep cycling. The 12V in the TCH is not used for starting.
 

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Optima has made a battery specially designed for the Prius, including the vent system:
http://shop.optimabatteries.com/products/productdetail/Optima+Batteries+DS46B24R+YellowTop+Prius+Auxiliary+Battery/part_number=DS46B24R/1737.0.1.1.73619.0.0.0.0?pp=8&
While I don't know for certain, I would think that the hybrid Camry probably uses the same battery as the Prius so this might work.
The information on the top of my 2012 TCH battery would indicate it is a 51 AmpHour battery, which is significantly more capacity than the Prius battery at the link -- 38 amp hour. The D34M has 55 amp hours.

You can find more battery discussion at this thread I started on the subject.

TCH 12V Battery Discussion

It is possible the newer models have larger batteries. There are reports of them going flat after not being driven for a few weeks, so perhaps Toyota increased capacity.
 

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On Toyota website, in Parts and Service section, then Batteries it stated...

If your vehicle is hard to start and/or has dim headlights when the engine is turned off, your battery is getting weak and should be replaced with a new TrueStart™ or True2™ battery. Manufactured to Toyota’s exacting standards for quality and performance, these batteries offer the right combination of cold cranking amps (CCA) and reserve capacity (RC) for reliable performance regardless of climate.
Believe it or not, a higher CCA rating isn’t necessarily a good thing, because it negatively affects RC, or the ability of your battery to hold a charge. TrueStart™ and True2™ batteries have been approved by Toyota engineers for years of trouble-free service–and no one knows your Toyota better than they do.
 

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Y'all still don't even know if his car is 2012 or not, yet everyone made assumptions it is.

Hey, camryfan, read this before you "nothing special" it:

http://www.greenhybrid.com/discuss/f49/12v-battery-replacement-27927/

I thought, it was proven beyond reasonable doubt, that Yellow Top Optima is the right choice for TCH? Both on size and storage capacities? Where did blue one came from? We got already numerous posts here last year, with one optimajim, having all this figured and resolved? Now we go for a new theory?
Even if it's 2012, does it have thrmistor or not? And if yes, does he know what to do with it? Haven't noticed any mentioning of that either.

Ron, as knowledgeable as you appear to be on the subjects, you could have done better job actually. Connect wires to new battery BEFORE replacing old one? You serious? You ever tried that yourself? All he needs is a reasonably small back up 12V battery, 20 or so bucks worth, hooked up parallel to battery cables, and that's POC to do. Why no one told him to have car turned ON, so that everything is powered off traction battery? Just in case?
You realize, it's The Wife's car? You know hell she'll put him through, if he ends up with $520 bill from dealer like the other guy?
 

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The only difference between the D34M Blue Top and the D34 Yellow Top is that the Blue Top has both the post type and wing nut type connectors. The later connector is for boat and RV accessories. Both are dual purpose batteries.

The M is for marine. That lets them jack the price up.
 

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The only difference between the D34M Blue Top and the D34 Yellow Top is that the Blue Top has both the post type and wing nut type connectors. The later connector is for boat and RV accessories. Both are dual purpose batteries.

The M is for marine. That lets them jack the price up.
Doesn't the "marine" type batteries supposedly give you many many more charge/discharge cycles than the car type batteries ? therefore the added cost/price ?
 

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"Marine" batteries are typically dual purpose. They provide reasonable cranking amps but can still stand up to many deep discharge cycles. More than automotive starting batteries for sure, but less than true deep cycle batteries. Both the Blue and Yellow tops are dual purpose batteries.

True deep cycle batteries have more capacity at the expense of cranking amps. They achieve this by using fewer but heavier lead plates. Note that the Blue and Yellow top batteries weigh the same at each size group. Dedicated deep cycle batteries are heavier and often slightly larger than their dual purpose equivalents.
 

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D34 Yellow vs D34M Blue? Yes, the specs look very similar. Optima claims the Yellow provides 2X the recharge life compared to a standard battery, while the Blue provides 3X. Perhaps just marketing hype...
 

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That might be true. But we'll never know.

It's hard to imagine how they could increase cycling capacity without using heavier lead plates. They could do this by using less porous lead material, but you would then expect a decrease in cranking amps.
 

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So no one knows answer to my question ?

how many Watts I can run off of the the new Camry's 12V Aux battery while the car is Powered On? doesn't have to be exact, an estimate is fine.

I want to buy a Power Invertor to use as Emergency Home Backup Power. Thinking of buying a 1750 Power Invertor.

Is 1750 Watt too high a number ? And is it possible to add more Wattage capacity ?

Thx.
 

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Connect wires to new battery BEFORE replacing old one? You serious? You ever tried that yourself? All he needs is a reasonably small back up 12V battery, 20 or so bucks worth, hooked up parallel to battery cables, and that's POC to do.
If you use the D34M Blue top battery, it is a piece of cake to connect the new battery before you disconnect the old. Just use the extra set of terminals, for your temporary, make before break wires. You are correct. It would be much more difficult if you use the D34 Yellow top which only has single terminals. Probably would need more hands than an octopus...
 

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how many Watts I can run off of the the new Camry's 12V Aux battery while the car is Powered On? doesn't have to be exact, an estimate is fine.
What I recall reading somewhere is that you are supposed to limit charging current to the 12V battery. From memory, I believe Toyota recommends a max of 5 amps. 5 amps at 12 volts is 60 watts (P=IV). The question would be whether or not the charger from the HV battery respects that charging limit.

That said, I think at one point Toyota may have used a gel type battery instead of an AGM. Gel types are quite sensitive to overcharging. It cause bubbles in the gel which in turn shortens their life. They may now be using an AGM which should take more than 5 amps.
 
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