Picking a Car Battery
Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=144059
Printed Date: May 05, 2025 at 12:52 AM
Topic: Picking a Car Battery
Posted By: euph111
Subject: Picking a Car Battery
Date Posted: January 21, 2018 at 11:36 AM
Hello,
I have a dash cam connected to a constant power source on my 2016 Subaru Outback. Its set with a low voltage cutoff so it powers off at a certain voltage level to help prevent a dead battery. Is there a particular car battery that I can buy that will last longer powering a dash cam? When I turn the car off, the dash cam would last about 4 hours before the voltage cutoff kicks in and powers it off. Would a Optima battery be better than regular batteries? If so, would the red or yellow top be better?
Art
Replies:
Posted By: shark mobile
Date Posted: January 21, 2018 at 8:57 PM
Deep cycle batteries are of course able to sustain longer than regular car batteries, and usually cost more than double. My question is however is your dash cam motion activated...and off not perhaps that’s a more reasonable avenue than having a camera that is constantly on recording nothing but darkness...food for thought.
------------- Solder, tape, repeat!
Posted By: canada chris
Date Posted: September 21, 2018 at 12:09 PM
hi. i had a similar problem with my Canadian shopping channel dash-cam, it would drain the battery totally dead if not shut off and unplugged from the cigarette outlet daily so it was totally useless as a night motion-activated surveillance it was represented as! my large format battery was a wet cell lead acid battery to fit a 1999 oldsmobile 98 royale SS V6 engine... not a small battery by any means ,not the cars original batt, and was not on its last legs until the dash-cam drained it dead twice..
i love the idea of an AGM battery in a car and i might put one in my current 2004 ford escape [because i would love to have the option of a permanently installed 120volt inverter on demand which i am planning, then i wont have to run the vehicle or start it and charge it up as often, because wet lead acid "starting batteries" dont like to discharge for long periods of time and then wait to be topped up. it kills the thin lead plates inside really fast! starting batteries want to be charged immediately and dont want to run dash-cams all night!! LOL at myself]
... sorry to mention this, however if you mentioned the group size of your battery instead of just the vehicle you might get faster help from people with similar batteries as you, who dont have to lookup what battery fits your subaru.. save them that extra step and it will probably also help yourself friend..
so yes, you probly want a sealed lead acid AGM batt with as much reserve amp/hours as you can afford and can fit,
P.S. don't forget lots of people put 2 batteries in their cars in different locations, you could add a second, cheap lead acid wet cell instead..maybe you have a good battery sitting around doing nuthin' and you wont have to worry about maximum charge voltage and out gassing and over charging and the differences between wet lead acid and gel cell and agm and lithium... etc etc
good luck my good friend
------------- A LITTLE CRITICAL THINKING AHEAD OF TIME CAN SAVE YOU A LOT OF LAYERS OF SKIN AND PINTS OF BLOOD
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