How to Pick the Right Battery Charger

Rocky James
I have 2 viper 12v 800w? Batteries connected in parallel and then to a fuse box. What size charger do I need to charge these batteries.

Tomn
Is it possible to charging a 12v 50 ah car battery with noco 1 ( 1 ah current. max 30 ah capacity) ? What will happen? It's can't reach a full charge or just take sum time?

Andrew
I have 2 chargers first is charging at 1.25 AMP second at 4.5 AMP I am planing to charge and maintain my boat battery which should I use

Richard Stutz
Greetings and thank you for taking our questions, So I, like many people, am trying to clean out and rejuvenate a big old truck battery which is about 160 some dollars at Walmart and up over 200 at some other car parts places. I have been looking at many videos and reading articles on how to clean out and rejuvenate these old automotive batteries and most of them say the same thing as far as using baking soda to clean out the battery and then mixing up a strong solution of Epson salt and distilled water to put back in the battery. Then they all say to charge it on a two amp trickle charger. But I have a four amp charger so do I need to go out and buy a two amp trickle charger or will my four amp charger work just fine? Thank you so much for considering and answering my question. Rick

James D Florindi
I have a 12 volt 8 Ah battery I will be using for my fishing sonar. I have an older sears 10/2/50 amp charger. Can I safely use this charger on the 2 amp setting with this battery?

Red Childress
I am upgrading to (2) Group 31 AGM batteries for my 80lb Trolling motor. Would it be OK to use a 20A 2-bank Guest charger that is currently in my boat?

Harry Cook
I want to get a fast smart charger for my Jazzy wheelchair that has two 12 volt 35 amp deep cycle batteries. Can you recommend a good one. I know this may seem like it is from a simpleton, but I just want to be sure that I get the correct charger. I also cannot spend hundreds of dollars on one.

Luke
Gday I have a 100ah calcium deep cycle battery and a pc400 battery charger that charges up to 4amp. Will this still charge my battery up or would I need to upgrade to an 8 or 12amp charger? Cheers.

Kym
I am in the market for a 24v 50A multi stage battery charger as I am looking around I found one that I thought was good but it says it is only good for 40 - 500Ah. Now I have a 24v 1000Ah battery bank. What is the difference?

David Hardy
I have a 24v trolling motor system and a 12v cranking system on my boat. How would I charge both systems with like a 2 or 3 bank 12v charger.

Dan Dettmann
I just bought a used boat which has electric trolling motors and a MAXX Ever Start 114 amp hours deep cycle battery. The guy was using a 750ml battery tender to charge it but I ran it hard Sunday on a trolling motor...have no idea what percentage of the battery I used was but couldn't fish it Monday because the green light hadn't come on yet. As it turns out...it took 30-36 hours to reach full charge (green light). Obviously not fast enough charging. What do I need to do a good job. Also...may be an old wives tale from the previous boat owner...but he told me I need to charge it real slow like that to get better performance out of the battery, better battery life, etc. He also said something about running the battery down all the way and then charging it...which may be another old wives tale and would be very inconvenient as I would be stuck out there on the lake somewhere with no power if I did that. Appreciate your opinions on the charger and proper way to use the battery. Thanks, Dan

Ivan Uriegas
Hello, I bought a 12v 22ah VRLA battery (to run a 12v 13a water pump), I also bought a smart charger (a Motopower 12v 2a) to charge/maintain it. I connected the charger to the battery and after some time it started to make a bubbling boiling sound. Did it damage my battery? And, what charger should I use to charge/maintain this 12v 22ah VRLA battery?

Paul
I have a 2 amp 12 volt battery sealed lead acid can I use a charger that have 4 amps 12 volt auto shut off

Rza
I’m planning to purchase a 12v 35amp hour AGM battery for use with a cpap machine while camping. We have also selected a 400w continuous use/800w peak power inverter to use. I’m having a hard time knowing what type of charger to purchase, as I’m on a tight budget. I know you have higher quality chargers listed, which is great, but I don’t know what type of charger I can use at all. A lot of the reviews mention float chargers, which works for storage – but I need something that will ensure the machine is able to run at night, and can be charged via wall socket during the day. Would a 2/6amp, 6/12v manual charger with self-resetting circuit breaker and an automatic trickle charger after the battery is full work for this?

For reference this is what the CPAP machine says under the electrical version of the manual, and this is where I get a little confused (though I have had others tell me they use this battery and inverter with their cpap just fine – but they use a 3 panel 45 watt solar charger which is unfortunately out of my price range.):
AC power consumption (with 60w power supply) 100-240 VAC, 50/60 Hz, 2.1 A
Ac Power consumption (with 80w power supply) 100-240 VAC, 50/60 Hz, 2.0 A
DC Power consumption: 12 VDC, 6.67 A

Any help or explanations are appreciated, as I am brand new to trying to figure this stuff out. :)

Tim
Hi there.
I’m doing a summer project and was wondering about deep cycle batteries.
I understand that when connecting the same batteries in parallel, it will have the same voltage but will double up in the Ah. However, let’s say I am charging the battery in parallel.
Let’s assume that the rating max charging current for a battery is 5 Amps and I have an 8 Amp charger. Would connecting the battery in parallel be able to handle 8 Amp charger? (Meaning that the rating max charge current will be 10 amps instead of 5 amps?? Or would the max rating current to charge is still 5 amps and can not handle it. I was wondering about this because wouldn’t that mean the battery will charge slower if it only takes in 5 amps? I guess it might be better for the battery life but was wondering if it could handle it)

Thanks for your help.

LRF
I have a AGM battery that was originally used on a solar sysytem. I have a Schumacher charger that has a setting for this type battery. The other day I went to charge it and it was very low 9% according to the charger. It charged fairly quickly to about 62% then plateaued off. I noticed that the wires next to the clamps got very hot. Any thoughts? My goal is to take this battery with me camping and use it with my CPAP machine. I dont have it in front of me but its 12 Volt. About the size of a large car battery.

Thanks

Richard
An excellent and very informative article, thank you!

I have a newer sealed, maintenance free, mid-range (in terms of quality) standard AGM 12v deep-cycle Marine/RV battery

930 marine cranking amps, 145 minutes reserve capacity, 75 amp-hours.

This is my first experience with AGM batteries of any sort.

My question: Is the electrolyte, absorbed into the glass matting, in these AGM batteries subject to stratification in the same way that the electrolyte in a flooded wet battery is?

Reason I ask: I use a smart charger that incorporates 8 steps in the charging/maintenance cycle. The 1st step is an automatic desulfation step. The 6th step is an OPTIONAL step that can be used occasionally to “recondition” or destratify the electrolyte in flooded wet batteries. This is accomplished by the application of 15.8v, for short periods of time depending on the voltage of the battery, to induce out-gassing and turbulence due to the rising bubbles. Destratification occurs when the turbulence causes the electrolyte to be mixed and rendering the SG uniform throughout the depth of the cell.

My obvious next question: Will it ever be necessary, or even safe, to use this optional 6th “reconditioning” step when charging/maintaining this mid-range, deep-cycle AGM battery?

John
I have 6 2v 300Ahr agm batteries hookup for 12 v, how many 250 watt solar panel will I need to charger my battery with a MPPT solar controller?

Nick Bointon
We have a catering trailer which has a bank of 6 × 120amp/hr 12v batteries powering an 4000w inverter to run fridges, microwaves etc. The normal consumption is probably only 600w. We have a honda 1000EUi generator which is1000w rated 900w. We run this to charge the batteries. We need a regulated charger of the maximum we can run from this generator, 40amp? What is the maximum we could run? Great site by the way, we have nothing similar in the UK which is where w are based, but the electrical info is international!

Richard
I have an UB121000 12V 100AH – Absorbant Glass Mat battery and I’m wondering if you can recommend me a good charger for it please?

I’m using the battery for a trolling motor.

Thanks for your time!

Trevor
Hello, I was hoping you could advise on battery charging for a large electric boat project. The battery pack consists of twelve Enersys SBS-EON-190F AGM batteries wired in series for three banks of 48 volts. Each battery bank providing 4×190Ah. I’ve heavy load relays that I may use to wire the three banks in temporary parallel or they could be hard wired together for the 12×190Ah power pack. These batteries require a fast charge cell voltage of 2.40V for frequent heavy discharge. It’s a monster battery pack I know but I’m hoping to achieve recharge in a day or less.

Herb Korn
Very informative. I have a class B motorhome with 4 80 amp hr, AGM batteries, a 2000 watt inverter/charger and a 280 amp high output alternator. The regulator in the alt. is running hot…15.2 volts into the batteries when first charging and I was considering an external 3 stage regulator. Advice? What is the max. volts that the AGM batteries should be charged at?
Thanks….Herb

Art
I liked the article, I just purchased a Evolution 1 Tent trailer and the prior owner installed 2 6v batteries for power and also installed LED lights. The batteries are connected in series to produce 12v. What typ of charger should I use to charge and maintain the batteries when not in use.
Thanks Art

Paul Mulvenna
Excellent article. Just wanted to make sure I’m right in thinking I can’t have too high a current from a charger for a battery so long as I don’t leave it charging too long? I bought my son a Peg Perego 12V John Deere Gator ride on for his birthday which comes with a 12V 12AH sealed lead acid battery. The supplied charger is only rated 0.5A so takes an overnight period to charge the battery each time it runs down (leading to an unhappy boy). If I was to buy a higher powered 12V charger (e.g. 8A) I could safely charge the same battery in about 100 minutes based on your formula – is that correct? Many thanks.

Ed
Help! No sun for four days and our batteries have dipped below 30%. We live off-grid with a PV array as our only charger. Time to get a genset and charger to keep the batteries healthy. The 12v batteries have a c20 capacity of 546ah. What do you recommend we buy? Thanks in advance, Ed

Sath
I’m using solar and have nickel iron batteries at 300ah and 48v. How high should the charge cycle, bulk, absorb and float cycles be. My charge is now at 63.1 volts, bulk is 57.0, absorb is 60.5 and float is 55.1. Is that in the right range?

Steve
Hi, I have a new HP8204B (high power) 24vdc 5A charger, I am using it to charge my 2 × 12v numax SLG63 gel cell batteries.
The light is supposed to turn green when the batteries are fully charged but I have to keep stopping as the batteries are bubbleing and getting hot ? is this ok ? I am not sure if the charger is a 3 stage or not ? some adverts say it is , some just say 24v ?
Thankyou Steve

Admin
Due to the fact that we don’t have all the information for your system we would need you to contact us at tech@batterystuff.com so that we can ask the appropriate questions, to get you the answer that you may need.

Dave Bort
hi my camper currently runs 2 100ah agm batteries and 1 110ah flooded battery .i have just installed a 100w solar pannel and 10a regultor how should i set the regulator …..for flooded or agm ? my plan is to swap the flooded for agm when funds allow

Debbie
I just purchased two AGM Optima Blue Top batteries (D27M) to use as house batteries on my houseboat (I live aboard). The Optima Blue Top batteries are replacing two wet cell batteries. I have been told I can’t use my current charger (Charles 9000 Series) with the Optima batteries. So now it looks like I need to buy and install a new battery charger. Do you agree? Or can a Charles 9000 Series also charge AGM batteries?
My current charger has three “banks”. One for the house batteries (in series), one for the port engine, and one for the stbd engine. I also have a battery for the generator which is not on a charger. If I’m buying a new charger, I’d like to get one with four banks to cover all the batteries. The engine and generator starting batteries are all wet cell.
Can you recommend some choices for a battery charger.
From the SPEC Sheet for the Optima Batteries (http://www.optimabatteries.com/en-us/shop/bluetop/optima-batteries-8027-127-d27m-27-bluetop-marine-deep-cycle-starting/), recommended charging info is:

Recommended Charging Information
Alternator: 13.65 to 15.0 volts
Battery Charger: 13.8 to 15.0 volts; 10 amps maximum; 6-12 hours approximate
Float Charge: 13.2 to 13.8 volts; 1 amp maximum; (indefinite time at lower voltages)
Rapid Recharge (Constant voltage charger): Maximum voltage 15.6 volts. No current limit as long as battery temperature remains below 125°F (51.7°C). Charge until current drops below 1 amp.
Cyclic or Series String Applications:: 14.7 volts. No current limit as long as battery temperature remains below 125°F (51.7°C). When current falls below 1 amp, finish with 3 amp constant current for 1 hour.
All limits must be strictly adhered to.

Performance Data
Cold Cranking Amps: 800
Cranking Amps: 1000
Nominal Voltage: 12 volts
Open Circuit Voltage (fully charged): 13.1 volts
Internal Resistance (fully charged): 0.0025 ohms
Capacity: 66 Ah (C/20)
Reserve Capacity: BCI: 140 minutes (25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off)

John
great site i love it ya the best u rock i love
you!?!?

BatteryStuff Tech
Yes, that charger is in the recommended range of 10-25% capacity.

SERGIO
Dear Tech

I am experimenting with a machine that runs on 24v. I want to replace the power supplies for a battery pack. I need about 100 Ah, so Im thinking 2 12v 120 Ah connected in series. My question is: Will a 24V/13A charger do the job on recharging my setup? I don’t have that much experience with batteries. I think it will, but rather ask the expert.

Scott Ivins
I have a Skeeter zx225 boat, 225 Yammy (03)and I run 2 hummingbird 997sihd electronics. I also have a minnkota 36V 101 TM on the bow. Previous electronics were older lowrance units and TM was a 24v system. I have recently upgraded my batteries to sears DH premiums 31m (AH 20/hr rate-100/capacity AH10hr/rate-92; CCA-1150; RC-205. Charger is a noco genius 4 bank (40 amp total). Previous set up had 2 positive wires (6g i think) coming from bow and connected to battery 1 + and the other to battery 2 +…why? I took the one off and just use the main + cable on battery 3 and the neg on battery 1 and +/- jumper between batteries 1/2/3. Does jumper have to be same size as main power wire? what guage do you recommned for jumpers? Does my system seem right…and what is the best way to test voltage output?

Katie
For a given AGM battery type, find the voltage and constant current for constant voltage and constant current mode of any given volts and amp-hours.

Tom
I have a c-pap machine that I use when dry camping. It is 5 amps, 600 watts. I need a battery that will give me 8 hours of power. Do you have any suggestions? Also, looking for right size inverter to handle the task along with good battery charger.

Thanks for your help

Clever Survivalist
Nice article because of simplicity. It is a great starting point for people that havent done alot of research, but for me, I had most of this info already. thanks for the article.

Barney
Thank you for such an informative site. I‘m trying to ascertain the best and best quality smart charger to buy from you for my motorcycle but have wondered if I need to worry about the fact that I live in a rural area with a lot of power surges. Is there any need to put a power bar/surge protector between the wall plug and the new smart charger? (and/or should this be done to protect the bike‘s expensive ECU ie: elctronic control unit?)
Thank you.

Audrey
Hello! Your site is a fantastic resource!
I‘m trying to size a multi-bank battery charger for a boat. It will float charge 2 lead acid starting batteries, one generator starting battery, and a house bank consisting of (6) 220AH 6V golf cart batteries connected series-parallel (The house system is 110-120VAC). I have a 5000W inverter and a 7500W gas-powered Kohler generator to produce AC when anchored/underway. The load on the house bank batteries will be no more than 20a (DC), but will vary over my intended use time of 12-16 hours between charging opportunities. Im looking for a fast charge time, because occasionally the charge source will be the gas generator, and the less that runs, the better.

I suspect my inverter is sized with a greater capacity than my battery bank can safely support. But it‘s what I have.

I would also love to be able to manually select the charging source for the house bank to switch between the engines’ alternators or a solar array in addition to the generator. Everything is 12V.

Two questions: Do you see any holes in my plan, and for the charger is my best option to get as many amps as I can afford?

Thanks in advance!

E-astronomer
Thank you for this great information! After studying many articles and web sites, including those specifically from authors writing about my own area of interest in batteries, I believe I found most of my answers (or at least solid confirmations and clarifications) here. But I still have a couple of questions because some of those other writings contradict each other and your material in a couple of ways. In addition, your information doesn‘t really address low amperage usage over cycles that are several hours long.

What I am hoping to do is use a ready-made portable power pack to run a telescope and hiker‘s GPS unit from a 12VDC cigarette-lighter style socket, a couple of USB powered items, and finally a laptop and possibly a little more from AC sockets provided on the same unit.

Expected consumption would be as follows:

Telescope (12VDC) ~0.7 amps for 5-12 hrs/night
GPS unit (12VDC – not sure, but probably very low draw and only for 5-10 min no more than 2x/night)
Laptop (110VAC) ~2.0 amps for 3-8 hrs/night
Cell phone (USB if available on power unit, AC adapter if not ~200mA not every cycle, but when needed ~2 hr recharge)
Tablet computer (AC adapter probably not used every time – 2000mA for 3-5 hrs when used)

Several places in your material and others I‘ve read, the statement is made that one should get the highest Ah rating they can. I think these materials have been about higher and possibly shorter-term draw in all cases, but I‘m not sure. Other material says, for the type of low power/long usage above, one should use something with an Ah rating of only about twice what they would probably use in one session on average, so as not to draw the battery down too much in one night, but enough of the total so the cycling is deep enough to preserve battery life by the proper amount of cycling (or something like that ;-). Still other places, I‘ve read that it is better to draw down the battery less (5-10% of capacity) to increase the lifespan of the battery. All of this has me confused.

I am trying to figure out two last things before I can figure out what I need:

1.) Should I limit my choice of Ah rating to a lower number (twice my need per cycle) for my kind of usage?

2.) This may be outside your subject matter expertise, or depend on specific unit features, but I also need to know if built-in inverters draw power when nothing is plugged into them. I haven‘t been able to find anything on that question.

Steve
I am installing a backup sump pump using a deep cycle marine battery with inverter. I have a 1.5amp trickle charger to maintain battery charge. We are not anticipating this pump to be used very often. Is a 1.5amp trickle charger large enough to maintain charge?

Rick
my girlfriend has a 2000 custon 1200 harley,she has a pigtail charger we cant find the plug in sorce for charging the battery on her bike ?

Mike
Love your site and your service. One question I have… I just purchased a Motocross YTZ14S from you folks for my Honda VFR800. I believe that the battery I received was an AGM, but I‘m not sure. Its not listed anywhere on the battery itself, nor is it on the invoice. I‘m using a Noco G1100 to keep it charged. As I‘m sure you know, The G1100 can run in Normal mode, or Cold/AGM mode. Will it harm it to use the Normal mode for charging or do I have to use the AGM mode? The manual for the charger says that if your unsure of the battery makeup, use the Normal mode. What does the charger do differently in AGM mode? Thanks for any light you can shed on this.

Bob
Very Informative page….I have a question regarding charge/absorption on a 24 volt battery bank. What is the highest voltage that should be used to charge a 230 AH/24 volt bank. I have been told a 48 volt charger can be used safely but sounds a bit suspecious to me….

Gokartfreak
Great article! could you please help me out. i am making a go kart, planning to connect 4 12v 80Ah VRLA batteries in series. what kind of charger should i use?

Steve
which charger would be used on a polaris sportsman 500 2008

Rocky
I recently purchased a Schumacher SSC-1000a smart charger for my new AGM marine battery. I have monitored the charging cycle and see no evidence of a 3 step process whereby the regulated voltage is dropped back as the battery approaches full charge. I have monitored this voltage with my digital meter and the digital voltage reading on the charger itself and have noticed the regulated voltage increases more as the battery approaches full charge. On the 10 amp rate the regulated voltage is just over 16 volts near full charge. And on the 6 amp rate the regulated voltage is just under 16 volts near full charge. This happens the same on the standard setting with a lead acid battery.

Is my charger working properly? Or is it not really a smart charger?

Bandit
Can I use a standard (1-stage) charger, set on 2amps to charge my new AGM 12AH motorcyle battery for initial use until I get a smart charger? Also, is an AGM battery also a VRLA battery? The box the battery came in called it AGM but the instructions that came w/battery call it a VRLA??? It has the multi-bottles of acid that you put in and seal. I appreciate any info.

Patrick
My battery charger (HP-1202B 24V2A) for my Phantom wheel chair does not work any more (I think it overheated). HP no longer makes this battery charger, so I ordered one from another supplier, but it did not work (though it had the above specifications). From where can I obtain one, and how do I know it will work. Thanks, Patrick

Mohan
Cool article, saved me a lot of time.
But I‘m not sure if I understood everything right, so I‘ll need some guidance.
I have a electric van, batteries: 18 in series per row, 3 of those rows in parallel, mounting to 54 batteries. They are AGM 12v 100Ah.
What type of charger and how many of them do I need?

Don Eddy
I live full time in a 1977 GMC motorhome. Three batteries/bank: 1 red top, 1 yellow top, and 2 6v golf cart. Red for the engine; yellow for the 6K genset (Onan); golf carts for the house. Solenoids separate all three until the ignition is on.
Converter, 40 amp, has never fully charged the three units with the ignition on; nor even the house and genset batteries with the ignition off. Now the converter is not operating. I need a converter/charger that will do the job through perhaps a change in wiring?

Allen Dorak
I just purchased a new V Star Custom 650. The manual says it has a Valve Regulated Lead Acid Battery. It says not to use a Conventional Battery Charger. I have a Yuasa 1.5 Amp 5 Stage Battery Charger. It says to use it on conventional batteries and maintenance-free AGM batteries. What do I use for this bike????? Now I have to buy another charger? Thank you very much for your help.

Moses
I lost the charger P/N 700150 for a Craftsman cordless hedge trimmer 24 VDC model 240.74802 I am looking for a replacement charger. Thanks

Kevin
Hello. I have a basic folding camper. The units were never factory fitted with electrics let alone a charging system. Which may well be a good thing as the most popular UK charging units fitted to caravans, campers and trailer tents only charges at 13.6V. So not only does it take an age to charge it never fully charges. My choice previously has just been to use a “dumb” charger. You sell intelligent chargers, now until recently I‘d never seen intelligent chargers with high single digit AH rates let alone double digit AH rates. Now I may well use a low rated intelligent charger to keep my battery conditioned when at home but what about on site? If I‘m on an EHU (Electric Hook Up not sure American term) I‘m not charging and running the battery in separate cycles. A whole range appliances may be plugged in whilst charging the battery. Does the use of appliances confuse the charger? How does it asses the battery if at the same time resistive loads, inductive loads or both are being taken out. The batteries used tend to be 80AH or 100AH “pseudo” leisure batteries. I say pseudo leisure batteries because there is some debate in the UK on how much thicker the plates are on these starter sized batteries as against the full thickness in 2V cells. Simple lead acid batteries or glass mat are generally used. The demands light (ish) lighting, audio, limited TV, water pump. To be honest as demand is low and temp reasonable battery life is quite good. More a case of being curious how intelligent chargers work if you‘re taking load at the same time? Thanks In Anticipation.

Gordon
I currently have a 24V set-up in my bass boat for the trolling motor. I upgraded to Optima Blue top batteries a few months ago. I installed a new 3-bank, 10amp DualPro charger the same day I installed the new batteries. I fully charged the batteries before using the boat. About two weeks later we fished a 3-day tournament and promptly wore out two new, fully charged Optima batteries in 7-8 hours of fishing each day. Yes, I charged them all night before the first fishing day. My partner lays on the trolling motor well more than I do: however, killing the batteries wasn‘t really the issue. Well, other than listening to him gripe about it and how HIS Skeeter‘s 36V TM system lasts all day and THEN SOME.

Anyway – I plugged in between 4pm-6pm on day #1 day (at our lodging on normal electricity) to charge the batteries. By 5am THE NEXT MORNING…the batteries were STILL NOT FULLY CHARGED. Same thing happened on morning #2 and #3. The starting battery was was obviously fully charged each day; however, depending on the TM battery, one may have been about 90% charged; the other in it‘s final stage (like 98%). The next day one TM battery was like 80% and the other 90%…after 12 hours on the juice. Brand new batteries on a brand new charger. I don‘t get it!!

Optima “recommends” using 10A chargers on their blue top batteries (if not all their batteries). I‘m considering moving to a 36V trolling motor. Here‘s my question. I‘m going to have to upgrade to a 4-bank charger to do this. I don‘t want to trash two Optima batteries that I just bought. I also don‘t want to wait 12-hours to have fully charged batteries. The charger I want to go to chargers at 30A, and I don‘t think it has a regulator (Protournament 300 Quad). That said, will 30A charger HURT the Optima batteries?

10A is going to take 10-12 hours to recharge a depleted trolling motor battery…no biggie for non-tournament fishing…but when you need the boat ready to go 12 hours after you get out of it…12 hours to charge two 12V batteries ain‘t cutting it. Had I known it was going to take 12-hours to get a full charge I wouldn‘t have bought the Optima batteries. To hear my partner tell it, his Odyessy batteries are FAR SUPERIOR to Optima anyway.

Ronnie
I have a question. I have a 15 foot bass boat,first boat ever and do not know a lot about the difference in batteries and all I know is it looks like a sealed car battery. I do not have any idea which charger I should get ,would sure like to know so I get the right one

Shawn
Super Informative. You saved me from ruining my batteries!!! Hat‘s Off To You!!!

Brendan Kiely
I can recommend the La Crosse Technology BC-700 charger.

This is a pretty sophisticated battery charger. I‘ve always just had simple ones but this one does far more. I‘m not even sure I understand all the functions and I‘m fairly techno-geeky.

More info: http://best-gear.org/la-crosse-technology-bc-700-alpha-power-battery-charger/

ARTHUR SIMON
span class="caps">FAILS TO PROVIDE CRITICAL INFO ON AGM OVERCHARGING VIA A ‘SMART CHARGER’ WHICH MAY FEATURE A “VOLTAGE RAMP-UP” PERIODICALLY [15-16 VOLTS] TO REDUCE ACCUMULATION OF SULFITES ON PLATES…HIGH VOLTAGE CREATES HEAT AND INDUCES WATER EVAPORATION…CAN‘T ADD WATER TO AGMS…OR GELS. THE ‘RAMP-UP’ MODE MUST BE DISABLED.

Amy
excellent website to know more about picking up battery charger,thanks.

Tripp
I had never seen this on your page before, well done!

Mike
Excellent advice & removal of some of the mystery of how to pick the proper charger, and terms used.

Thx,
Mike