RV.Net Open Roads Forum: Tow Vehicles: Battery Tenders

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tow Vehicles

Open Roads Forum  >  Tow Vehicles

 > Battery Tenders

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next
Sponsored By:
RCMAN46

NorthWest

Senior Member

Joined: 02/24/2008

View Profile



Good Sam RV Club Member


Posted: 12/11/16 05:35pm Link  |  Quote  |  Print  |  Notify Moderator

One thing you need to know about the battery tenders.

If left connected to the battery with no AC input the tender will run down the battery. The battery tender has a small load on the battery.

I had one on a car and the GFI had tripped. After 5 months the battery was totally dead. I mean like 1.5 volts dead. Not sure when the GFI tripped.

GA1dad

Upstate South Carolina

Full Member

Joined: 08/22/2013

View Profile


Offline
Posted: 12/11/16 06:18pm Link  |  Quote  |  Print  |  Notify Moderator

gbopp wrote:

How long does your truck sit between uses?


A couple of weeks and it goes down enough to keep it from starting. It'll roll over a few times, then click/click. Seems like I recall the gauge showing around 10 volts when this happens. If I drive it every few days there is no issue. I should just break down and drive it daily, it gets better mileage than my s-10 4x4. But that little 4 door S-10 is a good commuter.

Thanks for the advise folks!!

austingta

Austin TX

Senior Member

Joined: 10/12/2014

View Profile


Offline
Posted: 12/11/16 06:27pm Link  |  Quote  |  Print  |  Notify Moderator

GA1dad wrote:

gbopp wrote:

How long does your truck sit between uses?


A couple of weeks and it goes down enough to keep it from starting. It'll roll over a few times, then click/click. Seems like I recall the gauge showing around 10 volts when this happens. If I drive it every few days there is no issue. I should just break down and drive it daily, it gets better mileage than my s-10 4x4. But that little 4 door S-10 is a good commuter.

Thanks for the advise folks!!


There is something wrong for sure. The ECM and other things that use current don't use very much at all. You may have a battery or alternator problem.

Are there other uses that are left connected?


Frank Brooks Austin TX
2018 F 150 King Ranch max tow package with 3.55 gears
Published towing weight limit 13200
Payload per sticker 1464

dodge guy

Bartlett IL

Senior Member

Joined: 03/23/2004

View Profile


Online
Posted: 12/11/16 06:43pm Link  |  Quote  |  Print  |  Notify Moderator

Newer vehicles have a small draw. small enough so the computers don't draw it down over several days, but enough that if it sits for extended periods it will get drawn down. My X used to get pretty drawn down after 3 weeks, it would start, but crank very slow!


Wife Kim
Son Brandon 17yrs
Daughter Marissa 16yrs
Dog Bailey

12 Forest River Georgetown 350TS Hellwig sway bars, BlueOx TrueCenter stabilizer

13 Ford Explorer Roadmaster Stowmaster 5000, VIP Tow>
A bad day camping is
better than a good day at work!


Isaac-1

SW Louisiana

Senior Member

Joined: 08/12/2009

View Profile


Offline
Posted: 12/11/16 09:49pm Link  |  Quote  |  Print  |  Notify Moderator

It all depends on how much you want to spend, I have one of the cheap $20 1.5 amp harbor freight battery tenders on my 30KW diesel home standby generator it has been hooked up for 6 or 7 years and is still working. I change the battery out every 5 years regardless if it needs it, just because I don't want to ever have to deal with a dead battery during a storm. By contrast I have an BatteryMinder model 2012 which sells for $90 on amazon on my old diesel 7.3 F250 pickup (2000 model) which only gets driven occasionally to haul stuff on the weekends, again it works, gives a few more bells and whistles than the $20 Harbor Freight model, I don't know if it really worth an extra $70 though. (I bought it on one of their lightning deal specials a year or two ago for about half off during the holiday season.

(my motorhome has 400 watts worth of solar panels on the roof which keep the batteries charged)

rhagfo

Portland, OR

Senior Member

Joined: 07/06/2012

View Profile



Good Sam RV Club Member

Online
Posted: 12/11/16 10:23pm Link  |  Quote  |  Print  |  Notify Moderator

GA1dad wrote:

gbopp wrote:

How long does your truck sit between uses?


A couple of weeks and it goes down enough to keep it from starting. It'll roll over a few times, then click/click. Seems like I recall the gauge showing around 10 volts when this happens. If I drive it every few days there is no issue. I should just break down and drive it daily, it gets better mileage than my s-10 4x4. But that little 4 door S-10 is a good commuter.

Thanks for the advise folks!!


That is the best thing you can do for the truck, drive it.


Russ & Paula the Beagle Belle.
2016 Ram Laramie 3500 Aisin DRW 4X4 Long bed.
2005 Copper Canyon 293 FWSLS, 32' GVWR 12,360#

"Visit and Enjoy Oregon State Parks"


Turtle n Peeps

California

Senior Member

Joined: 06/23/2008

View Profile


Offline
Posted: 12/11/16 11:38pm Link  |  Quote  |  Print  |  Notify Moderator

austingta wrote:

GA1dad wrote:

gbopp wrote:

How long does your truck sit between uses?


A couple of weeks and it goes down enough to keep it from starting. It'll roll over a few times, then click/click. Seems like I recall the gauge showing around 10 volts when this happens. If I drive it every few days there is no issue. I should just break down and drive it daily, it gets better mileage than my s-10 4x4. But that little 4 door S-10 is a good commuter.

Thanks for the advise folks!!


There is something wrong for sure. The ECM and other things that use current don't use very much at all. You may have a battery or alternator problem.

Are there other uses that are left connected?


^^^^ This. Somethings up.


~ Too many freaks & not enough circuses ~


"Life is not tried ~ it is merely survived ~ if you're standing
outside the fire"

"The best way to get a bad law repealed is to enforce it strictly."- Abraham Lincoln


Strabo

Hooligan #96 -KampRat -Offroader

Senior Member

Joined: 09/19/2006

View Profile


Offline
Posted: 12/12/16 12:53am Link  |  Quote  |  Print  |  Notify Moderator

I use a solar maintainer for our toyhauler after I fully charge the battery bank. It's important to have a small constant charge on batterys that are not used regularly. Seems to work fine, 3 watt output.


04' F350 PSD TB SC FX4 XLT, TH-04' 32' Sandpiper Sport Fifthwheel WB Dual Axle
07' Rhino 686 SS106-ITP-AFE-BRP-T4-CDI-KIBBLEBWHITE-CVT-TSTICH-Ridgid LED LightBar-HID Conversion Kit-LIVEWIRE
04' Honda 250 Sportstrac quad
05' Honda 400 Ranchers quad



Chuck_thehammer

Ohio, or Very South Texas

Senior Member

Joined: 08/01/2013

View Profile



Good Sam RV Club Member

Offline
Posted: 12/12/16 06:47am Link  |  Quote  |  Print  |  Notify Moderator

answer is not so easy..

the older the battery . the faster it discharges.
I avoid the cheaper tender types.. Deltron Battery Tender was top. others are catching up.

1.5 amp with 2 batteries.. adding a single 2 amp diode will stop back draw.

over 3 weeks I can see a slow start. but NOT a No start.. if it continues have truck checked..

do you have add-on electronic devices in truck, they may not be turning off.

Snowman9000

IL

Senior Member

Joined: 01/07/2009

View Profile



Good Sam RV Club Member


Posted: 12/12/16 07:28am Link  |  Quote  |  Print  |  Notify Moderator

Yeah the batteries could simply be old and feeble.

My 2004.5 Duramax has a parasitic draw of 21 mA. Which I think is not much?? I was chasing a battery problem recently. Starting was weak on a good day, and got worse as the truck sat. It turned out to be a corroded + terminal on one battery. Prior to that I had never seen corrosion in a GM style terminal. I cleaned it up and everything has been great since.


2014 Sunseeker 2300 Class C (Chevy 4500)


Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next

Open Roads Forum  >  Tow Vehicles

 > Battery Tenders
Search:   Advanced Search

Search only in Tow Vehicles


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:

© 2019 CWI, Inc. © 2019 Good Sam Enterprises, LLC. All Rights Reserved. | Terms of Use | PRIVACY POLICY | YOUR PRIVACY RIGHTS