How do you know if your (12V) battery is on its last legs? - GreenHybrid - Hybrid Cars
GreenHybrid Interactive Hybrid Car Resource
Home Discuss Articles Compare Share Shop
GreenHybrid.com   Hybrid Car Forums   Tech Information   Mileage & Specs   Photo Gallery   Buying Guide  
GreenHybrid Mileage Database - Click here to track your MPG! Join Hybrid car discussions today - Create a FREE GreenHybrid Account

Go Back   GreenHybrid - Hybrid Cars > Hybrid Cars > Toyota Motor Corporation > Toyota Camry Hybrid

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 05-07-2012, 08:45 AM
Ridiculously Active Enthusiast

 
Real Name: Larry
Location: New Jersey
Hybrids: non-NAV '08 "The Gray Lady"
Posts: 2,002
Default How do you know if your (12V) battery is on its last legs?

I'll admit I haven't read all the threads on the 12V battery, nor really understand much about what it does, but, in a regular car, you can tell when your battery is going as the starter is sluggish, etc. You usually can tell (depending on the weather) when you're within a week or two of when it will die.
In the hybrid, (again, I'm not sure what the 12V battery does) are there any tell tale signs that the battery is dying? Does it have the same expected life as a regular car's battery (or is it longer as it doesn't need to turn over the engine to start)?
Thanks!

.

For answers to (almost) every question... **Toyota Camry Hybrid New Owner's F.A.Q. **
Reply With Quote
  #2  
Old 05-07-2012, 04:05 PM
ukrkoz's Avatar
Ridiculously Active Enthusiast
 
Hybrids: 2007 Camry Hybrid
Posts: 758
Default Re: How do you know if your (12V) battery is on its last legs?

it is nothing more - nor less - than power storage for all the electronics. look at it as back up power supply. has NOTHING to do with starting engine.

yes, esp if you have nav system. if you do, you can log into data display. there are several data displays, one of them will show you battery voltage. if it's below 12V, charge it. it should be in the area of 13+ - 14V after charge and stay there for extended time. if it quickly drops down - well, you got it.

I had mine charged last year, it showed 14.3V as a result.

If you do not have nav system, tough. you can take it to say Autozone, and they will tell you this or that about its state, but keep in mind - as I am in real good standing with my local O'Reilly guys here - they plain told me, their testers are not made for deep cycle batteries. There's a very complex procedure, wit plotting results, to determine health of a deep cycle.

I'd say, to keep it on the safe side - replace it after 7 years. mine will be there next year.

.




Reply With Quote
  #3  
Old 05-08-2012, 01:58 AM
Ridiculously Active Enthusiast

 
Real Name: Larry
Location: New Jersey
Hybrids: non-NAV '08 "The Gray Lady"
Posts: 2,002
Default Re: How do you know if your (12V) battery is on its last legs?

Thanks, so without the NAV system, there's no way to know, is there? Will car still start if 12V is dead? I'm a bit confused, what happens if the 12V is dead? (sorry for being dense)

.

For answers to (almost) every question... **Toyota Camry Hybrid New Owner's F.A.Q. **
Reply With Quote
  #4  
Old 05-08-2012, 07:25 AM
Active Enthusiast
 
Real Name: Steve
Location: Calgary, AB Canada
Hybrids: Camry Hybrid
Posts: 231
Default Re: How do you know if your (12V) battery is on its last legs?

Quote:
Originally Posted by haroldo View Post
Will car still start if 12V is dead? I'm a bit confused, what happens if the 12V is dead? (sorry for being dense)
Most likely if the 12V is dead your vehicle will not start. Remember it powers the electronics required to start the vehicle, although it does not directly supply power to the motors it is still required in the start process.
Reply With Quote
  #5  
Old 05-08-2012, 07:44 AM
Ridiculously Active Enthusiast

 
Real Name: Larry
Location: New Jersey
Hybrids: non-NAV '08 "The Gray Lady"
Posts: 2,002
Default Re: How do you know if your (12V) battery is on its last legs?

Thanks...thus my original question.
With an ICE car, if you start it with a dying battery, you'll hear it sluggishly struggle to turn the engine over.
With hybrids...what happens, you show up one morning and the car is totally dead? My point is...are there any leading indicators or is it just "sorry Charlie"?

.

For answers to (almost) every question... **Toyota Camry Hybrid New Owner's F.A.Q. **
Reply With Quote
  #6  
Old 05-08-2012, 06:59 PM
ukrkoz's Avatar
Ridiculously Active Enthusiast
 
Hybrids: 2007 Camry Hybrid
Posts: 758
Default Re: How do you know if your (12V) battery is on its last legs?

nope. it does not have starter. it starts off hybrid battery. electronics do not permit that battery to fall below a specific charge level, they will turn ICE on and recharge it.
if you car is d-e-d - dead - you have to tow it to dealership for them to charge hybrid battery and then you can go back to using it.
you can only approximate 12V battery condition. like I said - and I spent quite some time researching same question - you have to have special equipment to properly load test deep cycle battery.
like I said - sorry for broken record - for the heck of it, replace it at about 7 years. I came across post somewhere at Toyotanation, from end user, who had his 12V die on him twice - and he simply recharged it and drove the car. so, it's not a catastrophic failure. catastrophic is when hybrid battery goes boink.

.




Reply With Quote
  #7  
Old 05-18-2012, 10:36 AM
PB1 PB1 is offline
Enthusiast
 
Hybrids: 2009, 2012 tch
Posts: 3
Default Re: How do you know if your (12V) battery is on its last legs?

Quote:
Originally Posted by haroldo View Post
I'll admit I haven't read all the threads on the 12V battery, nor really understand much about what it does, but, in a regular car, you can tell when your battery is going as the starter is sluggish, etc. You usually can tell (depending on the weather) when you're within a week or two of when it will die.
In the hybrid, (again, I'm not sure what the 12V battery does) are there any tell tale signs that the battery is dying? Does it have the same expected life as a regular car's battery (or is it longer as it doesn't need to turn over the engine to start)?
Thanks!
Urkoz:
Dealer said this can't be done with my 2009 tcg navigation screen. How do you get the data screen?

Thanks,

PB!
Reply With Quote
  #8  
Old 05-18-2012, 10:38 AM
PB1 PB1 is offline
Enthusiast
 
Hybrids: 2009, 2012 tch
Posts: 3
Default Re: How do you know if your (12V) battery is on its last legs?

Inquiry was to Urokoz's post about reading the voltage on the 12 volt battery on the navigation screen. Into the learning curve on this site.

PB1
Reply With Quote
  #9  
Old 05-20-2012, 07:56 AM
ukrkoz's Avatar
Ridiculously Active Enthusiast
 
Hybrids: 2007 Camry Hybrid
Posts: 758
Default Re: How do you know if your (12V) battery is on its last legs?

I DO NOT BELIEVE that you can get into diagnostic mode on 07 models, and can NOT on 09 or later.

I can speak only for ones with nav unit - and just did it again. mof, I have entire write up posted back here (why there's no sticky-s here anyway?) on how to

press power button once>press and hold info button>start flipping light switch all the way forward-back> in 4-5 flips, diagnostic screen comes up on nav unit.

there's also way to test sound system and buttons on steering wheel. something about pressing 3-6-9 or some like that on nav keypad.

.




Reply With Quote
  #10  
Old 05-21-2012, 10:18 AM
Enthusiast
 
Real Name: Dennis
Hybrids: Toyota Camry
Posts: 9
Default Re: How do you know if your (12V) battery is on its last legs?

I have had two 12 volt batteries die in three years. Lucky they were both under warranty. Vehicle will not start when the 12 v battery is dead. You will need to jump start it. Measuring the voltage, the 12 v battery will show less than 12 v. I can't remember the minimum voltage before it will not start. After jump starting, if the vehicle is run, then it will charge up. However, if the battery discharges faster than before when vehicle is not used, ie overnight, then it is a sign that the battery is on its way out. The dealer can check to see if the battery can hold a charge.

My vehicle was purchased new, but about 9 months after the manufacturing date. The first battery probably sat for a long time and went through several discharge cycles. It only lasted about 2 months after purchase. Can't really blame anyone for that one. Dealer said that the 12 v battery is used to power the computer, thus has about 1/2 amperage as a regular battery (somewhere around 300 amps maybe). If you drive frequently, then it is not a problem. If you drive infrequently, it might pay to hook up a battery tender (designed for AGM batteries) to keep it charged.

I don't think the battery wears out any faster than a regular battery. Just that if you let the car sit for long periods without use - several weeks or more, then the battery will discharge. It powers security and other electronics with low voltage while the vehicle sits, so there is a small drain even when the vehicle is shut off.
Reply With Quote
 
 
 
Reply

Similar Threads
Thread Topic Starter Forum Replies Last Post
Can the GM SUV hybrids charge its own dead 12v battery? NiKMP GM Hybrid Trucks, Cadillac Escalade Hybrid, Chevrolet Tahoe Hybrid & GMC Yukon Hybrid 5 08-17-2014 02:46 PM
Killed my 12v battery last night (2005 Ford Escape HEV) and have questions after jump Jan in California Ford Escape Hybrid 1 08-17-2013 07:16 PM
How long with the 12V battery last in the FEH? turbotaguy Ford Escape Hybrid 7 06-09-2010 03:24 PM
90+ MPG PHEV or a horse with no legs??? hybrid_lady Anything Goes 0 05-02-2009 11:55 AM
Jumping Legs... masgian Anything Goes 4 02-13-2006 08:16 PM


Tags
12v, bad, battery, camry, car, charging, civic, dead, dying, escape, highlander, hybrid, lifetime, mpg, toyota

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




All times are GMT -7. The time now is 03:27 PM.

Home | Hybrid Discussion Forums | Mileage Database | Compare Vehicles
Terms of Service - Privacy Statement - GreenHybrid.com, Copyright 2008
InternetBrands.com Automotive Network