OPTIMA® Batteries D34M BLUETOP® Dual Purpose Boat and RV Sealed AGM Battery

It has been 10 years and 2 months now since we bought this battery. Put it on the boat every spring and took it off every fall. We’ve kept it on a trickle charger over the winter each year. Last week was the first time it didn’t start right up. Still not sure if it’s completely dead, but to go for over 10 years on a boat is pretty darn impressive. The other cool thing about this battery is that you can use a paddle board inflator without the boat being running. Not many boat batteries can do that! Love this battery and hopefully we can keep it going for a bit longer. If not, I’ll buy this same one again.

Much lighter than a walmart battery so far so good, we will see if it holds up with a all day fish, I will update later Upadate 4/20/16 Used this 8 hours on a 52 lb minn kota, It was windy and I used it hard hard figured it would go down before I left the lake, I was afraid it would not start my 25 hp motor, At end of day my trolling motor has a gage to check battery reserve and it said 3/4 full is that impossible so I had another battery checker and it checked 3/4 full can that be true, can that light of a battery hold that kind of reserve, If this is true and I guess it is,this is the only battery I will ever have. Finally something that gets me thought the day and I can carry from the boat that does not weigh a ton, I will update if things change. Update 5/3/16. Ok had it out 11 hours used hard hard, showed 12.2 volts, check with meter showed 1/2 charge left, unbelievable only battery I will own know matter the cost. Will update after a year 5/1/17 Ok bought a bigger boat with a older foot controlled trolling motor, the battery. We fished and used it from 9:00 am until 8:00 a 11 hour day of pretty much nonstop. After about 11 hours battery died. I still am very happy, if I had to do it over I would of bought the D31M check it out. It has 75 ah. That would have enough to run the day. Just a thought. It not that much more to buy the 31. My friend has a 31 and has had it for years maybe 6 or 7. Still works perfect.

These batteries are amazing and lighter than standard batteries and last way longer. I use them on an electric motor while fishing and it's the best, last all day.

I purchased this battery in FEBRUARY 2012, I put it in my small camper and it has never worked quite right and has acted strange. It would show a full charge and then slowly start to lose its charge over the next 24 hours, it ran everything fine but only for about 1/4 the time you would normally expect. I finally had the time to track down the problem thinking it was my fault in the wiring somewhere, I never thought the brand new Optima battery would be bad. So I finally tested the battery outside the system, and low and behold I have a faulty battery. I called Optima because it is still inside their 24 month warranty. They told me to take it to O'Reilly auto parts and have it tested and get a printout of the results (which said replace battery) and then I would need to return it to Amazon and that they Optima would not do the replacement. I called Amazon and they said they would ship me out another one since it was still under warranty -no charge and due to the difficulty of returning the old battery, they said keep it.

This is the ONLY battery you'll ever see in my boat !! Holds a charge a long time and can go the distance running lights and sound system for hours then still crank the boat up like a boss. I keep a tender on it all winter, then in Spring it fires my boat right up like it was brand new !!

I am like a lot of people wanting to save a few bucks. Unfortunately when you buy economy batteries you often lose money in the long run. This was the case for me so this time I went with a recognized industry leader. Optima batteries are top of the line and the difference in power and run time increase with these batteries is amazing. One word of caution. These are AGM batteries and they must be charged with a charger programmed for AGM batteries. If you use the wrong charger it could damage or destroy the charger and/or the batteries. Fortunately the onboard charger in my bassboat is designed to charge all types of batteries and a simple change of a screw in sensor ensures I will have these batteries in service for a very long time. When these batteries were delivered one of them was upside down. You can mount AGM batteries at any angle because there is no possibility of losing acid from the battery. The acid is soaked into fiberglass pads inside the battery. They were fully charged when I received them and I fished 2 long days with them before charging for the first time. I would highly recommed these batteries for any marine application. For the fishermen who have not used AGM battrries a word of caution. AGM batteries provide full power until they are dead. Most batteries will provide less and less power as the charge is depleted. That is a positive thing. Just know that when your battery loses its charge you have no notice. I charge every time I go fishing so I dont see this as a problem..

Just bought in July 2024 to replace a dead AGM. Battery seems to hold a 12.4v charge when I do not have the battery charger on the boat run. I drained the charge in 2 weeks with just the marine radio idle - not on - which was surprising. But, did let me know the Guest 10 amp charger was toast ( it lasted a surprising 20 years). Running two Humminbird Helix units, starts a Yamaha 150 hp 4-stroke and all boat accessories. Have hit it pretty hard with say 6 hours on the sonar units and so far so good. Will report back, but seems like a good battery and alternative to the newer lithium batteries.

I read a lot of details on the Optima battery line before purchasing this one back in February 2015 for my old CJ-7. I've had a lot of bad battery experiences through life and this time I decided I was going to pay the extra and get a high quality battery. I wanted a good mix of cranking power and long reserve for camping situations and after seeing so many good posts in various Jeep forums I went with an Optima BlueTop. I can say this BlueTop battery has been worth every penny so far and I expect to get well more than my money's worth out of it. This battery easily spins my 4.2L endlessly anytime I'm doing work on it without ever seeming to indicate it's had any drain at all. I've jumped numerous other vehicles off, run lights all night camping, etc. and never noticed the drain. I even accidentally let the battery drain itself dead from a small wiring short. It was left completely drained and dead for 4 full months and all I had to do was run a slow trickle charge for a couple of days and it charged right up and churns like new still with no issue.

Great battery no complaints

Excellent produit. Identique à la description: Batterie marine de démarrage et de décharge profonde. Tres bien emballé. Très satisfait.

Use this batterie on my boat working great

I would not buy from canada direct again. they suck, nothing but problems. Amazon should drop them pronto!

House battery for sailboat. Perfect fit. Delivered on time.