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Forum Index : Other Stuff : Battery Rescue?
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| VK4AYQ Guru  Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Your battery is undergoing sulphation by age, it slowly builds up on the plates caused largely by incomplete charge cycles due to the equalization charge not being high enough to convert all the sulphate back to acid and plate lead, a desulphator will help but will cost. The low charge setting for equalization 13.8 to 14.2 is the reason for mosstpremature battery failure. All the best Bob Foolin Around |
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| gww1 Regular Member  Joined: 14/06/2013 Location: United StatesPosts: 63 |
------------------------------------------------------------ -------------------- Not sure if this is of interest but here goes. http://www.anotherpower.com/board/index.php/topic,902.0.html Good luck gww |
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BobD Guru Joined: 07/12/2011 Location: AustraliaPosts: 935 |
Bob Thanks for the info. I expect that it will die next winter but I'll hold out for as long as possible. Bob |
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| VK4AYQ Guru Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Hi bob I have found one of those little 10 watt solar chargers will float the voltage up and keep the battery alive a bit longer, put it in the back window and connect direct to power as most use a cigarette lighter plug that is switched off by the accessories position on the ignition so is never connected to the battery when it needs to be. All the best Bob Foolin Around |
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| VK4AYQ Guru Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Hi Gww1 These are the ones I would recommend for your set up and with the mod suggested by Oztules would make a very good power supply, and run a small AC if you have a big enough battery pack and solar array. I bought two of these to experiment with but due to sickness I haven't done so yet but on reading the thread it is very encouraging. I believe the one you have is a HF inverter which is useful at low power settings but I have found them unreliable. All the best Bob Foolin Around |
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| BobD Guru Joined: 07/12/2011 Location: AustraliaPosts: 935 |
Bob I'll have a look at these. thanks Bob |
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| gww1 Regular Member Joined: 14/06/2013 Location: United StatesPosts: 63 |
Bob That is actually not my post that I had quoted. I was quoting a differrent poster and hoping that the mods that ozz made on his might be helpfull to those that mentioned the power jack inverters. There are a couple of other post on anotherpower forum with fixes of power jack also. I actually have an outback system. I was just hoping the link was germane to the topic being discussed and also hoping some one would find it helpfull. cheers gww |
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| gww1 Regular Member Joined: 14/06/2013 Location: United StatesPosts: 63 |
Bob also hope you are feeling better. gww |
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| VK4AYQ Guru Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Hi Gww1 Ozz has made the LF series of power Jack a usable device and I believe that as time goes on Power Jack will become a reasonable priced reliable unit, now they are supplying power boards and spares it makes them more useful in our projects. It is a shame OZZ is not participating in the back shed forum as he has a lot of skills and knowledge that would benefit us all. When i feel a bit better I will have a go at one of the units I have and try the Choke as Ozz suggests. At the moment I am trying to repair the damage to my battery bank from drying out,four weeks on the equalization charge and desulphator has helped this weekend I hope to test each module and finalize the re-hydration of all the cells and to re mount them in the rack. When that is done I have to do bank 2 as it is surely on the dehydrated list as well, but too good to just let go to scrap. I am feeling a bit better thanks for the thought, and actually walked to the shed yesterday to see if the rescue project on the burnt battery is progressing. All the best Bob Foolin Around |
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| VK4AYQ Guru Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Back to my burnt battery rescue. 
After two weeks on the desulphator the batteries are now at 15.8 volts and balancing well the total destruction and a two year sit will have done some long term damage but it looks like I have a usable 12 volt battery for my troubles. It can sit for another week in the desulphator then i will have to devise a closure over the damage to keep the dirt and rubbish out. All the best Bob Foolin Around |
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rustyrod Senior Member  Joined: 08/11/2014 Location: AustraliaPosts: 121 |
HI All, I was looking for a 6 volt desulfator for a truck battery I that use on my old vibrator radios. The battery was given  to me almost flat and useless to them.
Using my Grandpa's very old 6 volt charger, initially I charged it for 3 weeks before it started to float the hygrometer, eventually after another 2 weeks it came right up. 
Now after 6/8 months it is back in the red.(I haven't used it much) 
The battery is a EXIDE Heavy Commercial Long Life 26B 850CCA 6 Volt I found this and wonder will it work on such a big wet battery, as it is advertised for 4 ah to 40 ah ? At $59.oo it is almost same price as either a stand alone desulfator or a charger. Could be very handy? This unit would have been the ideal thing to have on a new battery from the start, I thinks. http://www.ebay.com.au/itm/141299214255?ssPageName=STRK:MEWA X:IT&_trksid=p3984.m1423.l2649 I copied this from another ebay seller's site, this has more info. Main Points Automatic Charging Compact and convenient Maintain battery and recover it's capacity Digital Display and More Protection Desulfator built-in Great Features: 1. Reverse pulse charging with advanced 7 stage algorithm 2. Advanced high frequency switching mode power supply technology 3. Efficiency>85% 4. Cooling: Nature Cooling 5. 100% full load burn-in test 6. Latest transformer technology 7. Multi-protection:Including reverse polarity,short circuit protection,over-voltage and over-temperature. 8. DC output isolated from AC input 9. Digital volt meter for user, to provide a friendly-user interface 10.Completely automatic charging,the charger can automatic stops when the battery is full and restarts when the volt drops. 11. Certificate:CE and CSA Specifications: Input voltage AC:240VAC,50/60Hz Output:6V/12V---1-4A Ambient temperature:-20 to +60 Cooling:fan cooling Charger type:7 step,full automatic switch mode Batteries:6V/12V batteries (wet, maintenance free, VRLA, AGM, etc) Battery capacity:4-40Ah Dimensions:12.5*8.5*7cm Weight:0.7kg Charging Cure(7 steps) 1) Initial charge step 2) Soft charge 3) Bulk charge 4) Absorption(high constant voltage) 5) Battery test(3 minutes) 6) Float charge( Note:The battery is full here when the floating charging is completed) 7) Replenishing charge&Maintenance charge Always Thinking |
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| VK4AYQ Guru Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Hi Rustyrod I have not had a lot of success with combination units as i prefer the old type charger that the voltage can go a bit higher than the regulated ones preferably a float it 16 volts for a few hours or days depending on the size of the battery. I use the infinity desulphators, have a look at the start of the thread for description as they have worked for me, once you get the voltage up above 15 on a 12 volt system a float current of 3-4 amps is all that's needed, no sense in boiling the battery with high current when it is a chemical conversion back to acid and lead that is more important. The type of charger you linked to is more useful with good batteries that you want to float and keep in good condition rather than rescuing an older battery that is sulphated. You will need to use and keep charged your battery as it will sulfate again and each time it is harder to remove. All the best Bob Foolin Around |
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| rustyrod Senior Member Joined: 08/11/2014 Location: AustraliaPosts: 121 |
Hi Bob, "The type of charger you linked to is more useful with good batteries that you want to float and keep in good condition rather than rescuing an older battery that is sulphated" Thanks, I thought as much. After following your "Battery Rescue" some time ago I got a multi voltage desulphator and have been switching it around my batteries as they need a charge. A little elf told me Santa is bringing me a 12 volt infinity unit. I hope to fit a permanent 24 volt unit to my Patrol next year too. MY problem at the moment is I have one and only one big black 6 volt battery. The desulphator I have will not work with 6 volts. So can I use a [say] 60 watt 12 volt bulb in series with the battery and the 12 volt charger with the 12 volt type desulphator connected to the charger side of the voltage dropping bulb/resistance ? BUT, will the pulses pass through the bulb ? I have been using various bulbs to limit the charge to little SLA batteries for years. Always Thinking |
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| VK4AYQ Guru Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Hi Rusty rod The globe trick is a good way to charge but it does damp out the spikes needed to break down the sulfate, but it would be better than nothing just do not expect fast results. I have used a bell vibrator across the battery while charging, minus the bell of course if you can get your hands on one at the trash and treasure shop, my original desulphator had one of the vibrators out of an early battery radio power pack, but they are are a bit hard to find these days. Another thing that works on six volts is a trembler coil off an early ignition system as in T model ford but also a bit rare but I have seen them on ebay. A good battery charger can be made with a old car generator and a washing machine motor with an amp and volt meter and a resistance in the field connection for adjustment they will charge from 6 volts to 24 volts and make a good boost starter to boot. The mechanical rectification by the brushes creates a nice spiky charge current. Food for thought. All the best Bob Foolin Around |
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| VK4AYQ Guru Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Hi All For those of you that are adventurist with a soldering iron and have some time to experiment here is a electronic device desulphater that is simple enough for even me to have a go at, note the first page correction of a component. 2014-12-13_224229_desulfator.pdf A bit more information on the desulphation process. http://www.reuk.co.uk/Battery-Desulfation.htm All the best Bob Foolin Around |
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| Georgen Guru Joined: 13/09/2011 Location: AustraliaPosts: 462 |
I do odd soldering, but am scared to even think about this project. George |
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| VK4AYQ Guru Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Hi George I know what you mean its got one of those multi leg insect things in it but we must be brave and get out themagnified glasses, will be worth the eeffort if I can get it to work. All the best Bob Foolin Around |
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isaiah Guru Joined: 25/12/2009 Location: United StatesPosts: 303 |
Ah you guys can do it, If them little Chinese guys can do it. Yours probably wont have cold soldier joints. Isaiah URL=http://www.motherearthnews.com/Renewable-Energy/1973-11- 01/The-Plowboy-Interview.aspx>The Plowboy Interview[/URL> |
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| Georgen Guru Joined: 13/09/2011 Location: AustraliaPosts: 462 |
If I get the list printed, will I be able to get all the components at Jay-Car? Or it is better to order them through E-Bay? Also is this 555 "spider' called: IRF9Z34 - P channel MOSFET ? ( Sub 30 dollars desulphator is tempting, but hate to overestimate my capabilities to end up with 30 dollars worth of worthless pile of components :) ) George |
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| rustyrod Senior Member Joined: 08/11/2014 Location: AustraliaPosts: 121 |
Jaycar seems not to stock a 1000uH choke, Will 2 by 470uH in series be close enough. They do have the 220Uh at 5 amps type listed. Has anyone got the specs for the UJT -- IFR9Z34 because Jaycar do not have them listed. Jaycar has others with the specs in their catalogue. Always Thinking |
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