20 Best Agm Deep Cycle Marine Battery (2022 Updated)

The OPTIMA D34M is an amazing deep cycle battery. It’s durable, dependable and has lots of reserve capacity for normal outboard starting – I wouldn’t have anything less in my boat. To give you some idea how good these batteries are.

Many years ago, I found one dumped at the local tip. It wasn’t damaged, so I took it home and tried charging it. It charged fine, so I fitted it to by boat (50HP Honda outboard) and it lasted TEN MORE YEARS before I replaced it with a new one.

That was 4 years ago and the “new” one is still going strong. I only use my boat 10 times per year so the outboard takes some cranking to start sometimes (old fuel in the carbies). I have just one outboard and one battery on my boat.

It’s important, when I’m 10Km out to sea, to know that the outboard will start everytime, and the D34M is the best battery I’ve used. I told my brother about my D34M and this purchase is for him – his old boat battery died after nearly 3 years use and he too reckons the D34M will be good value in the long run.

I have to admit when I bought this blue Optima back in Sep, 2011 I didnt think it was going to last 9years. Fast forward to 2020 and it still holds decent charge and powers my 2006 Honda Acccord. I have the yellow top on my Odyssey and that has been working fine for over 10years.

Extremely satisfied with both the blue and yellow tops, well done Optima. Due to Covid, I have parked both these cars and I trickle charge these to full every 6weeks or so. My other 2 cars when the time comes to replace, I will with Optima.

Side of battery says [12V 100Ah/10Hr] to 10. 5V! Which is a full discharge and will not be good if you want to junk them too soon. They recommend 50% discharge for longevity, ~Im guessing 50. 2V for 48Vsys or 12.

56V for 12Vsys. If you paid for this battery, and you actually need capacity, $230/50Ah for 500-800 cycles of 60Wh x 650 cycles. Lastly! There is a C# Rating. Which essentially a reference spec that says the faster you discharge over benchmark of 100Ah/10H, it will dynamically use more than rated capacity and need to charge more often or sooner.

Constantly worrying about over-specified bench-line performance is not fun, for you or the battery, and in my case a battery Bank.

Thus far its working as expected. The capacity appears to be there, self-discharge rate is very low as expected, and it’s 100 AH rated, which I’m not about to draw down 100% to find out — but it appears to be an honest rating.

Pricing is fair, especially when one considers that a battery of this size is quite heavy and thus shipping is not cheap. It came well-packed which was appreciated and prevented damage in transit. Time will tell whether durability is also as expected; you can probably do better on the durability side with LiFePO4, but at material additional cost, never mind the charger required is different (and more expensive) as well.

For me, at least with my needs, SLA is plenty good enough. This is the primary 12V storage for a modest cargo-to-RV trailer conversion and is working well.

I use this battery in a 5th Wheel that is parked on my mountain property. It runs the microwave and all 120v circuits through a Renogy 2000w inverter. Charging is done by 400 watts of solar. I charge various constructuon 18v tool batteries and even other RVs through the inverter.

This AGM 12v 200ah batteey has power and depth. I thought I needed 2 of them, but one has done the job. I hope it will last several years.

I bought this battery to replace an existing LifeLine GPL-31T battery in our RV. Date code old battery showed ‘CN’ which as per my understanding is March (C = 3rd letter alphabet) 2014 (N = 14th letter in alphabet).

So we got 6. 5 years out of the old battery. I am hoping to get the same or more life out of the new one. If not, I may switch to a Lithium battery in the future. New battery was shipped in heavy duty carton and undamaged at time of delivery.

I received a fresh battery (GT = July, 2020) and the battery itself is very well build. Very happy with the ordering process and fast shipping. I would buy again from The Battery Guys.

Replaced like for like leisure battery. Previous one fitted in 2008, so had good service from it. Really appreciated the handles on the battery too. Good to find that the battery is still available. Not the cheapest, but you get what you pay for.

Quality battery!.

Just bought a great 1987 campervan and it needed a new deep cycle. After asking around, doing some research, and even getting an older manufacturers specs for the conversion. all pointed to a Lifeline battery! Worth every penny! This thing CRANKS!.

I needed a new hold down bracket for this battery. The space in my boat was perfect for this upgrade. The available power is so much better than the previous group 24. Time will be the biggest determining factor in how well the battery performs, but initial opinion is that the increase in power allowed me to troll all day with all electronics powered up, and the battery was still going strong.

I could finally start my main engine without the chart plotter cutting out due to low power. First time ever!.

This is the best group 31 size AGM battery I have found. It’s listed at 220 minutes Reserve Capacity (RC) and 1150 CCA (cold cranking amps). Most other AGM group-31 batteries are less than 200 minutes RC and less than 950 CCA.

I use this battery in the coach of my van camper RV, and this battery keeps my refrigerator running all nigh long. And the battery has the power to be a backup starter battery to my vehicle in case the main engine battery goes dead.

I really like the AGM technology because it doesn’t corrode my terminals, doesn’t spill, and doesn’t need periodic water fillings. Great battery!.

These are non-return items. I didnt double check what style batteries and got the wrong terminal design. I was able to make them work with terminal adapters though.

I have 2 of these. One in my 2018 Camaro SS running a 2000D Sundown SAE and my 2014 Ram 1500 RT running a Synergy 3500 watt amp. This battery is a must. All I can say is don’t cheap out, get good stuff.

This battery is top-notch.

This battery is in my diesel dual battery truck and it had so much power it starts with ease. And no more dimming lights with my stereo system. Best battery ever. It is big though. Make sure you have enough space to put it in.

This battery has really help my electrical system and the performance of all my equipment if your looking to take your system to a new level it doesnt get better than this one buy with confidence and speedy delivery the best experience on eBay.

Bought this for my granddaughters power wheels semi truck. Much heavier duty than the original, most amp hours. She can ride for several days without needing a recharge. The original had to be recharged every day she used it.

Not being the first time I’ve purchased these batteries I decided to choose them again after a couple of years and the same result applied as to the first purchase of this brand. The batteries lose alot of their charge after charging to full capacity.

Batteries are supposed to “float” around 13. 5v when fully charged but these go to around 12. 25v once they fully settle down hot off the charger. I wouldn’t recommend these batteries to anyone knowing this about them.

No problems thus far, Battery operates my garmin fishfinder allllllll day long with juice left.

I am a consulting engineer and cannot afford to have my computing systems unavailable due to a power failure. My primary backup is a high quality computer uninterruptable power supply (UPS) that provides 120VAC power to my computer system.

It automatically switches to its internal 12VDC battery when there is a power failure. The problem is that the UPS can carry the load for only about 50 minutes on its internal battery. I added this battery as an additional external battery in parallel with the UPS battery.

With this extra battery the UPS can carry my computer load for 10+ hours. It is kept charged by the UPS. It is completely clean and perfectly suitable for the ventilated utility closet where the UPS is located.

I bought two of these for my solar setup. I’d like them so well that I bought two more for my RV. well in about 90 days they would only charge up to 12. 62 volts. had an expensive charger regulator. but no matter what I done they wouldn’t charge past but 12.

6 volts. so I sent them back. and they replace them. so I am still using those and they seem to be working all right. but the first two I bought also had the same problem after about 5 months. Would not charge past 12.

6 Volts. so after arguing and several emails the distributor agreed to take them back. Walmart would not help at all says it’s up to the distributor and me. well after four or 5 weeks and hearing nothing from the distributor, not even an email.

I called Walmart One Last Time. they agreed to give me a full refund. so we’ll see how that goes. 4 Batteries going bad, bad luck, or crappy batteries.

These Batteries were purchased to replace an Identical make and model purchased 3 years ago. These were for the most part Identical to the last ones. Unfourtinatlly, the last ones failed in 3 years of very light use.

I can only hope these last longer, I could not find another brand in the time alloted that would replace them.

Got this about a month ago and it fit perfectly into my UPS. Charged it for about a day then installed it. Working like a charm so far. No issues.

Work Great, just install and they work, I get about 4-5 years use out of them, I have them in all of my APC 1500 units (5). I just replace one set in a unit that was 5 years old.

We just put the bass boat in the water last week. We now have two Blue top 27 series for the trolling motor. After 9 hours in the wind they were still as strong as when we launched. We also got a 31 series for the cranking battery.

Livewell pumps can run all day without a problem. Best decision I ever made. They may cost a little more but you get what you pay for and I have friends that are on there 6th season with them. I will never use any other battery.

Since the first order was messed up and you sent the wrong batteries! Finally got the correct one. You need to consider Identifying your products by with the PRODUCT NAME instead of just a NUMBER! (Ie.

Optima Blue Top 27M) This would help people working in your warehouse to identify the correct product on the ORDER!.

Used as engine batteries in my Class A motor coach. Excellent power and cold cranking amps to support diesel starting power.

Replaced my old batteries in chair with these and they hold less of a charge than my old batteries. Ive bought these before but this is the first bad experience Ive had with them. In my estimation they are not a good value for the money.

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-Short version, since full review rejected- I’m told GEL cell batteries last longer than AGM batteries, and do not have “memory” or balancing problems, but mine seem to have a little less “oomph” in the output than AGM — which can be worrisome when dodging cars while running late on the way to a Doctor’s appointment.

I’ve only had this set for a year now, and they already seem to keep a lower charge, even after a full 24-hour recharge. I hope to get around to taking along a couple of spare old batteries (still good for a mile?), and running my GEL cells all the way down to see how well I can still count on them — and then be able to swap to the old ones so I can still get home afterward.

Came like most batteries, about 75-80% charged. Finished it off with a 2 amp charger. Only thing is that the top of the battery says not to charge at a rate higher than 7 amps. and recommends 4 amps.

My charger has three settings, 2 amps, 8 amps, 12 amps. Don’t want to void my warranty, so after I used it the first time, I had to use the 2 amp rate. Took a long time to charge. The battery did well for it’s size, used it with a Minn Kota 30 lb thrust motor.

On a canoe. Ran the canoe upstream for about 3/4 mile in a strong current at the highest setting, battery never got hot, motor ran good. Charger showed about 60% when I hooked it up that afternoon. Not an expert on these things, this is the first I have ever had, but I am happy with it so far.

Like the battery. Compact and light weight. Dislike: Walmart store would not give me a core credit on my old Walmart battery because this is a 3rd party supplier. Also , you can order direct from supplier and pay 5 dollars less with free shipping.

Walmart customer service did make good and awarded me $25 dollar gift card. I really appreciate them stepping up and going the extra mile to make me a happy customer.

10th month of use, I am using it as a replacement for a 350 watt APC UPS battery. Tips: Use a modern solid state charger on AGM settings to install it FULLY charged. I found it initially (brand new) topped off correctly after 45 minutes.

Do not throw out the charging rate/characteristics paper included with it ! I installed mine with two battery isolation switches, so I could top it off (2 amp AGM setting) every 30 – 90 days without back feeding into the APC built in charger to protect the UPS.

That can expend bat life. Battery seems to mate well with constant charging characteristics of the UPS.

I have had terrible luck with Kickass products. My first issue is with the Digital Watt Meter that dies during use. The second is the 12L per minute pump that stopped working during its recent maiden voyage to Fraser Island and lastly is the battery that did not hold charge as long as my 135Ah from another supplier The first product was a gift from a mate but the next 2 purchases are recent ones so I’ll be contacting Australian Direct for some hopefully good explanation and replacement or refund as the stopped pump really imposed on our water arrangements and the battery is huge/heavy and doesn’t justify the compromise.

Great product. Have purchased a 120ah battery through Kickass previously and they were brilliant to deal with. The 170ah slim is a great compact size and fitted snug behind the back seat on my D-Max and handles my Engel easily.

Postage was also ridiculously fast as usual. Would recommend their batteries highly.

Going the extra capacity and spending the extra cash goes a long way. Do it right the first time and you won’t end up changing your setup down the track. The more Battery the better! Great slim line features and never worry about a flat battery 👍🏼.

Le batterie Optima sono le migliori per la nautica, per via della ricarica pi veloce, Durano di pi rispetto alle batterie nautiche tradizionali. Ottime per le vibrazioni. Le vibrazioni costanti e gli scossoni delle onde possono essere letali per le batterie nautiche tradizionali.

TraduciMostra in lingua originaleI have no idea how good the product will prove to be. It is a battery for heaven’s sake. Your service however, was outstanding. You delivered inside the time you promised.

The website is simple. First class. Well done. Grenville Byford.

TraduciMostra in lingua originaleBought for my boat – too early to tell how good it will be as I’ve only had it on the boat for 10 days – but reputation is good which is one of the reasons I bought it.

Nice and compact but very heavy. Excellent service fro Tayna as always and lowest price I could find.

No problem with fit; first couple of days while boondocking it seemed to work well, minimal charge loss with sparing 12v usage; will take longer time to know for sure, but it was a good price compared to others and it offered what I was looking for for my RV house battery.

Replaced previous Duralast battery with this one. Working great, no issues.

I am in awe of the quality of service that The Battery Guys exhibit. From start to finish, my experience with them has been flawless. As some of the others I too was a little concerned about purchasing 1000.

00 plus dollars in batteries on line but I can tell you these guys make it happen. Bought two batteries and one shipped separate than the other and Fed Ex was no help in fixing the problem. Called Jim and in 1 hour told me my battery would be there the next day and it was.

If you are making the investment in the quality batteries that, they offer then you must buy them from The Battery Guys. Pricing 5 stars Service 5 stars quality 5 stars. Thank you Battery Guys.

I purchased 5 Lifeline 4D Deep Cycle and 2 Group 31 Starting Batteries. I went with Lifeline based on great product reviews and reputation and I have not been disappointed. I went with the Battery Guys mostly because they had the best price and free shipping.

I ended up being very pleasantly surprised by their excellent Customer Service and Support. They quickly and efficiently helped me through an unexpected installation/configuration issue that was a miss on my end.

The Battery Guys is an on-line retailer that does it right!.

I was very pleased. They were very professional. Good prices and no hassles the whole thing, was much easier than I thought it would be thanks to them.

Spring break week and we were first time owners of a new to us pontoon. We decided that we wanted to have an extra battery for the boat just in case kind of thing. The price was right, Benton store was close by, hop, skip, and a jump and we had the security of an extra battery.

Downside, we had to pay extra because we didn’t have a battery to turn in for a core charge. I don’t feel like that was fair on our part. As suspected, we needed the battery afterall; not for the boat, but for my camper.

The battery had ran low of water and wouldn’t hold a charge, leaving us in a bind when we needed to hook back up. That battery just needed a good charge put back on it. So now I have 3 good batteries, which was the plans, and still nothing for a core charge.

Just doesn’t seem right.

I bought this so I could have power in my new cabin, with it I bought a brand new 500 Watt Traveler Inverter with a Traveler Battery Charger so I would not wear out my Brand New Champion 4500/3650 Generator that I bought this month also.

I bought a two year protection plan for this item. I highly recommend that anyone needing good durable products shop at Tractor Supply Stores first. I’m not saying this because I think I might win something but because I have already won by shopping here in the first place.

Their help is friendly and knowledgeable so don’t be afraid to ask for help. I personally love Tractor Supply for all my off grid needs.

Bought 2 of these deep cycle batteries for solar application. They are wired in series at 24 v. They had new date codes and had a good charge when bought. So far they have been working great. Camping seasons coming soon and I will be adding a pair to my popup as well.

Good price good product and ease of buying. I have used the similarly priced and spec comparable ones from a certain big box stores. these are much much better.

Item was exactly what I needed and was easily purchased and ready for collection quickly. Would have liked it a bit cheaper but this was the price. Quite satisfied.

Batteries as described to replace our existing Victron batteries onboard our Hanse 400. Serial number of type has changed but Tayna were helpful with this issue and new batteries slotted straight into compartment.

Good morning, what will be the plomo / acid / gel battery (deep cycle) but suitable (price / quality ratio) for a Minn Kota endura C2 30lb electric motor, for duck? Is the shipper suitable? Saludos, Luís Moreira.

When I’ve purchased a battery in the past, it at sold or near fully charged. In this case, the battery was sold in a significantly discharged state. It was maybe 30-35% charged. After it placed it on a charger overnight it seemed fine.

However, in general the store should either maintain next-to-be sold batteries in a charged state. At the very least Advanced should have informed me that the battery had been on the shelf and not maintained, and would need to brought up to charge before use.

FIve stars for the two Diehard Group 27s that I bought to replace with these — hoping they are still as reliable. I used them in parallel as the house batteries for my boat and they were reliable and lasted almost 7 years without any issues.

They were charged only via the main engine chargers, and were subjected to some high temps (we are in Florida) but never any below frost.

I bought two of these deep cycle batteries to use as ‘house’ batteries in my motorhome. While I am happy to get them at a good price through the use of a discount coupon, I’m troubled by them not being ‘fresh’ batteries.

Buying batteries that only have a one year warranty is a roll of the dice to begin with but you have to be really concerned when they are six months old when you get them. In the future I’ll probably go back to the warehouse club and get fresh batteries with a 36 month warrantee.

That said, longevity is the key to battery value so we’ll see.