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What Battery charger for this need? #4538472
10/09/17 07:21 PM
10/09/17 07:21 PM
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
StevieC Offline OP
StevieC  Offline OP
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
So I have a new Blackvue 750s 2 channel dash cam in my vehicle. (Horrible drivers where I am, long story). Anyway it's wired to record when it's parked as well and it will do so until the battery voltage drops to a certain point and then shut-down leaving enough reserve to start the vehicle.

Anyway, I thought it would have enough power to record all night long but it seems that the battery I have in my vehicle just doesn't have enough lasting power to do so. (Even though it's brand new).

So I was thinking of getting an automatic trickle charger and modifying it with a quick/disconnect connector as needed and then just plug in the vehicle when I get home. (Plug is like 2ft from where the vehicle front end is).

What would be your thoughts on keeping the battery topped up and the dashcam running? 2 amp enough?

Thanks all!

Last edited by StevieC; 10/09/17 07:26 PM.

'18 Dodge Grand Caravan GT - AMSOIL SS 5w20
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF
Re: What Battery charger for this need? [Re: StevieC] #4538485
10/09/17 07:33 PM
10/09/17 07:33 PM
Joined: Jun 2003
Posts: 33,551
ME
eljefino Offline
eljefino  Offline
Joined: Jun 2003
Posts: 33,551
ME
2 amp should be plenty. But your battery is either rubbish or the camera falsely shuts off.

Re: What Battery charger for this need? [Re: StevieC] #4538488
10/09/17 07:34 PM
10/09/17 07:34 PM
Joined: Jan 2009
Posts: 6,511
New England
gathermewool Offline
gathermewool  Offline
Joined: Jan 2009
Posts: 6,511
New England
So, you let the cam shut off on low voltage and then the only recharging your battery gets is via your alternator? What is the cut-off point - what is your battery voltage before you start the car? 12.6, 12.4, 12.2VDC?


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter (64,774 miles)
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter (40,803 miles)
Re: What Battery charger for this need? [Re: StevieC] #4538491
10/09/17 07:38 PM
10/09/17 07:38 PM
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
StevieC Offline OP
StevieC  Offline OP
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
When I shut the vehicle off the battery voltage is usually 12.4. When I go to start up in the morning some 10 or so hours later the battery voltage is 12.0. (I have to monitors in the truck and both read within .1v of each other)

They do sell an external battery pack for this camera to run it all night but it's pricey so I was hoping to get away with a charger instead and keep the battery topped off and warm in the winter time as well. (2 birds with one stone sort of thing)

It draws approximately 1 amp while it's running.

Last edited by StevieC; 10/09/17 07:42 PM.

'18 Dodge Grand Caravan GT - AMSOIL SS 5w20
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF
Re: What Battery charger for this need? [Re: StevieC] #4538493
10/09/17 07:42 PM
10/09/17 07:42 PM
Joined: Jun 2003
Posts: 33,551
ME
eljefino Offline
eljefino  Offline
Joined: Jun 2003
Posts: 33,551
ME
Your battery shut off voltage should be near 13 with the surface charge then it should dip to 12.6 or so at room temps. Something's screwy, louie.

Re: What Battery charger for this need? [Re: StevieC] #4538498
10/09/17 07:45 PM
10/09/17 07:45 PM
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
StevieC Offline OP
StevieC  Offline OP
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
Sorry I was giving you stable voltage. It is higher but then settles at those described above.


'18 Dodge Grand Caravan GT - AMSOIL SS 5w20
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF
Re: What Battery charger for this need? [Re: StevieC] #4538507
10/09/17 07:52 PM
10/09/17 07:52 PM
Joined: Mar 2008
Posts: 5,960
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,960
South Florida
Yes a trickle charger is ideal for this application.


17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
10 Acura TSX 2.4 Maxlife Syn 5W30
06 GMC Sierra Nextgen 10W30


Re: What Battery charger for this need? [Re: bubbatime] #4538509
10/09/17 07:53 PM
10/09/17 07:53 PM
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
StevieC Offline OP
StevieC  Offline OP
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
Originally Posted By: bubbatime
Yes a trickle charger is ideal for this application.


2amp you figure?


'18 Dodge Grand Caravan GT - AMSOIL SS 5w20
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF
Re: What Battery charger for this need? [Re: StevieC] #4538517
10/09/17 08:03 PM
10/09/17 08:03 PM
Joined: Dec 2002
Posts: 42,288
New Jersey
JHZR2 Offline
JHZR2  Offline
Joined: Dec 2002
Posts: 42,288
New Jersey
Originally Posted By: StevieC
When I shut the vehicle off the battery voltage is usually 12.4. When I go to start up in the morning some 10 or so hours later the battery voltage is 12.0. (I have to monitors in the truck and both read within .1v of each other)

They do sell an external battery pack for this camera to run it all night but it's pricey so I was hoping to get away with a charger instead and keep the battery topped off and warm in the winter time as well. (2 birds with one stone sort of thing)

It draws approximately 1 amp while it's running.


This is your clue. 100% charge on a battery is 12.65-12.7V. 12.4V is maybe 70% charged, 12.0 is maybe 15%.

Figure out why your vehicle isn't charging the battery fully first.

Also put an ammeter in series and determine what the cam is drawing. You ought to meet that need with a charger, or a bit more. Some chargers will throw a fault for too much parasitic draw, so you'll need to try a few. You don't want something so dumb that it doesn't recognize the load and cooks your battery in time.

Re: What Battery charger for this need? [Re: StevieC] #4538520
10/09/17 08:06 PM
10/09/17 08:06 PM
Joined: Jun 2003
Posts: 17,809
Deplorable in apple valley, ca
Chris142 Online content
Chris142  Online Content
Joined: Jun 2003
Posts: 17,809
Deplorable in apple valley, ca
A fully automatic charger will only charge whats needed. So an 8a automatic charger will only put out 3a if thats all it needs.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: What Battery charger for this need? [Re: JHZR2] #4538524
10/09/17 08:13 PM
10/09/17 08:13 PM
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
StevieC Offline OP
StevieC  Offline OP
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
Originally Posted By: JHZR2

This is your clue. 100% charge on a battery is 12.65-12.7V. 12.4V is maybe 70% charged, 12.0 is maybe 15%.

Figure out why your vehicle isn't charging the battery fully first.

Also put an ammeter in series and determine what the cam is drawing. You ought to meet that need with a charger, or a bit more. Some chargers will throw a fault for too much parasitic draw, so you'll need to try a few. You don't want something so dumb that it doesn't recognize the load and cooks your battery in time.


When running it's charging at 14.3v so the charging system is fine, and it was load tested by the dealer when it went in for a recall and I had the battery replaced there because it's in the wheel well and forget changing that nonsense myself. Can't be bothered but the battery was toast.

Anyway according to my loading battery tester I ran on it afterward it's fully charged when shutdown and snaps back to proper voltage after a load test is applied.

I really think it's just the parasitic draw from all the junk in the car already plus this camera that it puts up with for about 8-10 hours and then shuts down when I unlock the doors because it's enough to push it over the edge at that point.

I will try a 2amp automatic charger plugged in when I first get home until the next day and see if that does it. If not I will step it up.

I appreciate everyones input. Cheers2


'18 Dodge Grand Caravan GT - AMSOIL SS 5w20
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF
Re: What Battery charger for this need? [Re: StevieC] #4538547
10/09/17 08:54 PM
10/09/17 08:54 PM
Joined: Jan 2009
Posts: 6,511
New England
gathermewool Offline
gathermewool  Offline
Joined: Jan 2009
Posts: 6,511
New England
Buy the external battery pack.

Are you at least using a deep cycle battery? I can’t imagine a starter battery lasting very long under those conditions, even if you charge it every night


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter (64,774 miles)
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter (40,803 miles)
Re: What Battery charger for this need? [Re: StevieC] #4538548
10/09/17 08:55 PM
10/09/17 08:55 PM
Joined: Jan 2009
Posts: 6,511
New England
gathermewool Offline
gathermewool  Offline
Joined: Jan 2009
Posts: 6,511
New England
Buy the external battery pack.

Are you at least using a deep cycle battery? I can’t imagine a starter battery lasting very long under those conditions, even if you charge it every night


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter (64,774 miles)
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter (40,803 miles)
Re: What Battery charger for this need? [Re: StevieC] #4538572
10/09/17 09:33 PM
10/09/17 09:33 PM
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
StevieC Offline OP
StevieC  Offline OP
Joined: Aug 2008
Posts: 21,175
ON, Canada eh?
No it's using the vehicle battery at the moment but it doesn't allow it to drop below 12v. I think with an automatic charger capable of keeping the battery topped up and the parasitic draw from the Dash Cam it should be ok.


'18 Dodge Grand Caravan GT - AMSOIL SS 5w20
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF
Re: What Battery charger for this need? [Re: StevieC] #4538606
10/09/17 10:30 PM
10/09/17 10:30 PM
Joined: Jul 2008
Posts: 672
Maryland USA
rubberchicken Offline
rubberchicken  Offline
Joined: Jul 2008
Posts: 672
Maryland USA
The best trickle charger is the genuine " Battery Tender ". I prefer the 1.25 amp version, commonly available for around $50. I believe it comes with one quick disconnect harness, and you can buy all sorts of adapters as well.

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