Recent Topics
Removing silicone spray overspray/residue
by Calikura - 02/23/20 09:13 PM
Oil Questions for My New Mower
by CamBurt33 - 02/23/20 08:43 PM
2007 Vibe coolant smell
by philipp10 - 02/23/20 08:36 PM
S&W 38 Special
by BlueOvalFitter - 02/23/20 07:23 PM
Oil Life Monitor question
by Mark72 - 02/23/20 07:06 PM
Any member a tax accountant ?
by mjk - 02/23/20 07:00 PM
Driven oil delivered after 6 months
by luna - 02/23/20 06:48 PM
M1 209 VS M1 209A
by BlueOvalFitter - 02/23/20 06:19 PM
Sig P516 - my take
by stockrex - 02/23/20 05:45 PM
Advise for Euro E36 M50 engine
by Lucase483 - 02/23/20 05:43 PM
Those with 5.3's weigh in
by Speak2Mountain - 02/23/20 04:26 PM
wix 2019 sienna oil filter cartridge fitment
by s2krunner - 02/23/20 02:19 PM
Urban Carry G3
by Gebo - 02/23/20 02:16 PM
Denso Iridium TT's are great
by jayjr1105 - 02/23/20 01:46 PM
Girl Scout question
by ffhdriver - 02/23/20 01:36 PM
MTD Snowblower issues
by 97prizm - 02/23/20 01:19 PM
Newest Members
wjamyers, L00btech, Lucase483, Chaucha, UofA
70790 Registered Users
Who's Online Now
32 registered members (avi1777, BlakeB, Char Baby, carlprop, Cdn17Sport6MT, Calikura, 1 invisible), 1,315 guests, and 19 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics301,849
Posts5,203,947
Members70,790
Most Online4,538
Jan 20th, 2020
Donate to BITOG
Print Thread
Hop To
Desulfating a Battery #5325546 01/17/20 05:41 PM
Joined: Dec 2016
Posts: 492
5
5AcresAndAFool Offline OP
OP Offline
5
Joined: Dec 2016
Posts: 492
I just got a Battery Minder 2012 and I am curious if it would do a more efficient job desulfating a battery if one was to purposely bring down the level of charge on a battery before charging it to extend the time that the battery is receiving the 2amp charge.

If the battery is in float mode desulfating wouldn't the pulses be less intense than at a higher current level or am I looking at this wrong.

I definitely feel having a battery maintainer with temperature compensation is a necessity here where the temperatures vary from -15 degrees to 100 in summer.

I use the Battery Tender jr.on my daughters original power wheels battery that is 4 years old and still going strong, and my lawnmower batteries last many years where it's common for folks here to need a new battery every few years.

Maintenance charging is definitely the key to a long battery life even if it's not temperature compensated, at least in cold weather which is where I typically have the tender jr. going for months during long periods of storage.

Last edited by 5AcresAndAFool; 01/17/20 05:45 PM.
Re: Desulfating a Battery [Re: 5AcresAndAFool] #5325579 01/17/20 06:38 PM
Joined: Aug 2017
Posts: 1,205
D
Dave9 Offline
Offline
D
Joined: Aug 2017
Posts: 1,205
You are looking this wrong. Bringing down the level of the battery just shortens its lifespan. Sulfation isn't much of an issue unless the battery is left sitting at partial charge for long periods, which you are effectively reducing by using the float maintenance charger during off season storage.

You also don't really need a battery maintainer with temperature compensation. If it's a built in *free* feature, sure why not have it but you can just use a float charge level that ends up very low mA at the float charge voltage so you aren't cooking off electrolyte. Temperature compensation is far more important for faster charge rates.

Unless the charger/maintainer is defective towards its purpose, all you need to do is hook it up when you are about to leave the battery stored/unused then disconnect it for periods where there are not long periods between normal recharge events. I suppose if you want to go the extra effort, you could use a normal faster charger to get it near 100% before hooking the float charger up, but these aren't huge batteries so the amount of time at relative charge level isn't that long for a little float charger.


Last edited by Dave9; 01/17/20 06:41 PM.
Re: Desulfating a Battery [Re: Dave9] #5325643 01/17/20 07:45 PM
Joined: Dec 2016
Posts: 492
5
5AcresAndAFool Offline OP
OP Offline
5
Joined: Dec 2016
Posts: 492
I do have a battery that is sulfated that I am trying to get some more life out of. I'm curious how well the desulfating charger performs. I took cca and milliohm readings before I started it as a baseline.

Re: Desulfating a Battery [Re: 5AcresAndAFool] #5325662 01/17/20 08:00 PM
Joined: Jun 2003
Posts: 20,291
C
Chris142 Offline
Offline
C
Joined: Jun 2003
Posts: 20,291
Originally Posted by 5AcresAndAFool
I do have a battery that is sulfated that I am trying to get some more life out of. I'm curious how well the desulfating charger performs. I took cca and milliohm readings before I started it as a baseline.

I have not had any luck desulfating one. I even tried epson salt. No dice.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Desulfating a Battery [Re: 5AcresAndAFool] #5325687 01/17/20 08:28 PM
Joined: Apr 2013
Posts: 334
V
vwmaniaman Offline
Offline
V
Joined: Apr 2013
Posts: 334
I have one of those Battery Minders that I use all the time on one vehicle or another. I know it sounds impossible, but I use it on our 87 VW Cabriolet and the battery is a Wally world battery dated 11-02. I just can't believe they work so well. As 5 acres says, they can make those lawn mower batteries last a long time. My youngest sons truck has sat for a year without being started. Used it on his battery and it now starts that 4.9L Ford.


Don't waste your time on a slipshod repair.
Re: Desulfating a Battery [Re: 5AcresAndAFool] #5325930 01/18/20 03:12 AM
Joined: May 2005
Posts: 12,193
C
Char Baby Online Content
Online Content
C
Joined: May 2005
Posts: 12,193
I've been using a Schumacher Battery Maintainer in the Firebird in my signature since 2000.
Prior to buying the maintainer, I replace the battery faithfully ever 5 yrs as the battery wouldn't hold a charge any longer in that 5th yr.

When I bought another battery in 2000, I also bought this maintainer and connected it directly to the battery and mounted the maintainer under the engine compartment(atop the battery). This battery is now(drum roll)...20 yrs old and still kicking.

There is no crusties on the battery terminals EVER although I always check. And (A BIG AND), I often remove the battery caps regularly to make sure there is proper acid level above the lead plates and fill with distilled water if needed.


Retired 6 yrs now & lovin' it
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic 1.8 LX
Re: Desulfating a Battery [Re: 5AcresAndAFool] #5328769 01/21/20 01:11 PM
Joined: Jan 2004
Posts: 6,495
N
nthach Offline
Offline
N
Joined: Jan 2004
Posts: 6,495
AFAIK, "desulfation" of a battery is done by such chargers via an algorithm. If the resistance is too high, the charger applies a series of "jolts" to shock the sulfate back into the electrolyte and then alternates with normal charging voltage to try to restore state of charge. I've heard those "jolts" applied are in the 15-16V range before returning to 12-14V.

Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™