Notices
991
Sponsored by:

991 Battery Voltage

 
Old 05-25-2018, 11:00 PM
  #1  
flickroll
Addict
Rennlist Member
Thread Starter
 
flickroll's Avatar
 
Join Date: May 2014
Posts: 1,090
Default 991 Battery Voltage

My wife was involved in an accident in our 2017 Honda CR-V that could have easily been fatal. As it turns out she was very lucky and the worst injury for her is a cracked sternum, and on the car side, a totaled vehicle. The accident was clearly not her fault and the other driver initially said, ‘I am so sorry, I don’t know what happened’. That changed to ‘I might have been hit by another vehicle which pushed me into you’. That finally changed to ‘you might have hit me’. Since it had been raining and there were no skid marks, the dolt State Trooper said he could not determine fault. Never mind there is damage on the car that clearly shows where he initially hit her. But I digress.

I am now installing dash cams in our 3 vehicles. A dash cam would have proven fault in the accident my wife was involved in. I have a relatively new 991.2 GTS (11/18 delivery), and I installed a Blackvue DS900S-2S in that car. Part of the installation is a device that will continue recording after the vehicle is parked. You can set the length of the additional recording time, and you can set system voltage to either 12.0v or 12.5v. The system shuts down when either condition, recording time or system voltage, is met. The problem is the GTS’s system voltage pretty quickly drops below 12v and the system shuts down in a few minutes. FWIW, when I’m driving the car the system voltage is somewhere between 14.2-14.4v.

What am am I missing here? The battery starts the car very quickly and briskly, and the battery has never been deep drained. My replacement CR-V will record for hours after the car is shut down.

thanks
flickroll is offline  
Old 05-26-2018, 03:04 AM
  #2  
N2B8TOR
User
 
Join Date: Dec 2017
Location: So Cal
Posts: 70
Default

I would not run dashcams off my car battery. What I do is connect my dashcam to something like this:

https://www.blackboxmycar.com/collec...=5073937203237

The car charges the battery while driving. When youíre not driving thereís enough battery to run your dashcam for a day in parking mode. Plus you avoid the risk of coming back to a dead car battery when you have equipment failure and the dashcam doesnít stop recording at the set low voltage.
N2B8TOR is offline  
Old 05-26-2018, 10:32 AM
  #3  
flickroll
Addict
Rennlist Member
Thread Starter
 
flickroll's Avatar
 
Join Date: May 2014
Posts: 1,090
Default

Originally Posted by N2B8TOR View Post
When youíre not driving thereís enough battery to run your dashcam for a day in parking mode.
I can't get more than a half hour before the voltage drops below 12v.
flickroll is offline  
Old 05-26-2018, 11:00 AM
  #4  
StormRune
Super User
 
StormRune's Avatar
 
Join Date: Nov 2013
Location: Austin, TX
Posts: 3,375
Default

This isn't a direct help for you, but just FYI of an alternative in case long-term parking is important to you and you want to consider changing cameras.

I have a ThinkWare F800 and it will record overnight if I set it to use the low drain 1-frame-per-second mode instead of the higher-drain motion detection mode. It will still flag impact detection in either mode. I keep it in my truck parked outside when I don't have it in the car and use it as sort of an overnight house monitor. But it will also record in the car overnight with the voltage cutoff set at 11.9 volts (on the times I've left it in the car at night but I try not to leave it on in the car except when I'm parked while out at restaurants, shopping, events, etc.).

I don't think the BlackVue has a low power parking mode and you might need to get the $300 parking battery, Another nice thing with the ThinkWare is the voltage monitor and the max-duration timer is built into the software of the camera itself so no additional add-on is needed. The settings are controlled via a smartphone app The only negative with the ThinkWare is if you leave the volume on to get any of the alert sounds it can do with its computer-vision abilities (collision warning, departure warning, and/or lane-drift), it is awfully chatty on startup with no way to disable the startup sounds.
StormRune is offline  
Old 05-26-2018, 11:38 AM
  #5  
flickroll
Addict
Rennlist Member
Thread Starter
 
flickroll's Avatar
 
Join Date: May 2014
Posts: 1,090
Default

Originally Posted by StormRune View Post
This isn't a direct help for you, but just FYI of an alternative in case long-term parking is important to you and you want to consider changing cameras.

I have a ThinkWare F800 and it will record overnight if I set it to use the low drain 1-frame-per-second mode instead of the higher-drain motion detection mode. It will still flag impact detection in either mode. I keep it in my truck parked outside when I don't have it in the car and use it as sort of an overnight house monitor. But it will also record in the car overnight with the voltage cutoff set at 11.9 volts (on the times I've left it in the car at night but I try not to leave it on in the car except when I'm parked while out at restaurants, shopping, events, etc.).

I don't think the BlackVue has a low power parking mode and you might need to get the $300 parking battery, Another nice thing with the ThinkWare is the voltage monitor and the max-duration timer is built into the software of the camera itself so no additional add-on is needed. The settings are controlled via a smartphone app The only negative with the ThinkWare is if you leave the volume on to get any of the alert sounds it can do with its computer-vision abilities (collision warning, departure warning, and/or lane-drift), it is awfully chatty on startup with no way to disable the startup sounds.
Stormrune thanks for the insight. I have committed to Blackvue (have 3) so the battery may be my only option. There's a Memorial Day sale at The Dash Cam store which is 10% off plus free shipping which makes the Blackvue B-124 battery $270 so I might get it. I really don't need longterm monitoring. I'd say no more than a few hours as the GTS is not my DD and I just want to record the surroundings when I'm not around, for example in a store. The car will never sit out overnight so long term monitoring isn't needed. Don't understand however why the car battery dips below 12v so quickly however....
flickroll is offline  
Old 05-26-2018, 12:00 PM
  #6  
flickroll
Addict
Rennlist Member
Thread Starter
 
flickroll's Avatar
 
Join Date: May 2014
Posts: 1,090
Default

Originally Posted by N2B8TOR View Post
I would not run dashcams off my car battery. What I do is connect my dashcam to something like this:

https://www.blackboxmycar.com/collec...=5073937203237

The car charges the battery while driving. When youíre not driving thereís enough battery to run your dashcam for a day in parking mode. Plus you avoid the risk of coming back to a dead car battery when you have equipment failure and the dashcam doesnít stop recording at the set low voltage.
Thanks N2B8TOR, might have to go to the external battery. But it just does not make sense the the GTS battery dips below 12v so rapidly.
flickroll is offline  
Old 05-26-2018, 12:44 PM
  #7  
N2B8TOR
User
 
Join Date: Dec 2017
Location: So Cal
Posts: 70
Default

Originally Posted by flickroll View Post
Thanks N2B8TOR, might have to go to the external battery. But it just does not make sense the the GTS battery dips below 12v so rapidly.
I forgot to say Iím glad your wife is ok. A cracked sternum is no joke. Having said that this situation is why I have dual channel dash cams in all our cars.

I would definitely disconnect the dash cam and check your car battery voltage over night. I tested my own car battery and I donít think itís ever gone below 12V. Unless I was in the car with the ignition on (but engine not running) for at least 30 min messing around with my stereo. You need to rule out something in your car draining your battery so quickly, vs a bad battery.

Regarding the dash cam, if you donít need parking mode recording I wouldnít use it at all. Equipments will fail and someday it wonít shut down when voltage has dropped below its set limit. This usually happens at the most inconvenient time. Even if everything works I donít think running the car battery down from 12.6v to 12v multiple times is good for your battery. Youíll prob need to replace your carís $200 battery more often.

Regarding battery tester I love this little gem. Measuring voltage alone is not sufficient. This little gem is what youíll need:

SOLAR BA9 40-1200 CCA Digital Battery and System Tester https://www.amazon.com/dp/B00IZFNJ6Y/ref=cm_sw_r_cp_api_i_CeycBb9WACHZ4
N2B8TOR is offline  
Old 05-26-2018, 01:21 PM
  #8  
Porsche_nuts
Super User
 
Porsche_nuts's Avatar
 
Join Date: Jan 2010
Location: New York
Posts: 3,019
Default

I think the 991 battery is "alway on" checking the car's systems, which is why the battery gets drained faster than other cars. There are times when I go into the garage to get something and hear weird noises coming from the car (even if it has not been driven that day) - as if it is checking something. Either that, or its possessed.
Porsche_nuts is online now  
Old 05-26-2018, 03:20 PM
  #9  
N2B8TOR
User
 
Join Date: Dec 2017
Location: So Cal
Posts: 70
Default

Originally Posted by Porsche_nuts View Post
I think the 991 battery is "alway on" checking the car's systems, which is why the battery gets drained faster than other cars. There are times when I go into the garage to get something and hear weird noises coming from the car (even if it has not been driven that day) - as if it is checking something. Either that, or its possessed.
You can turn most things off by locking car w your key fob.
N2B8TOR is offline  
 


Thread Tools
Search this Thread
Quick Reply: 991 Battery Voltage


Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: