They died too quick, IMO. Outside looks like new, inside totally destructed. One developed a shorted cell. And both got sulphated even though on a marine charger continuously. They are not good for house batteries, they run down and that kills them, we did not even get 20 trips out on the water with these. Deep cycle they really are not. I replaced them with Deka 6 v golf cart batteries from Lowes which are a true deep cycle design. Perhaps only good as starting batteries.

I've had this battery (and a Group 24) on my boat for the past 3 years and it hasn't failed once. Of course, my batteries are connected to an on-board charger that maintains them and where other brands (Interstate and DieHard) have failed after 18 months with the same set up these have excelled and this in a very hot environment (FL). You can't go wrong and they're made by East Penn so it's the same company that makes Deka Batteries very good!

I have used these Duracell Marine Batteries for the past several years. I use them in gangs of two per group, a total of 6 batteries for 12V power backup systems with 120V inverters. About 2008 I purchased two of these and they lasted just short of three years with weekly trickle charging, and usage maybe 15 to 18 times a year running them down to 50% remaining charge. in 2011 I purchased 4 units, set them up with Duracell battery maintainers, and they were used probably 20 times a year, from 30% to 50% discharge. My units that were purchased in 2011 just gave up the ghost a few months ago.. over 3 years operation as standby energy with the battery maintainers hooked to them. Monthly water addition required of course. Not too shabby for $80 deep cycle batteries. I have friends who spent the giant bucks for Optimta's, barely got 18months life from them, a few just over 1 year. What can I say, when you need reliability, stick with Duracell. I am treating myself to a christmas present of 6 new 27DC group Duracell Marine batteries... I believe these are an excellent purchase, as long as you keep them properly maintained and excercised.

I'm just now replacing my 2, Duracell group 27 deep cycle marine batteries that run my 24v trolling motor, from 5-2018. And I'm only replacing them because I'm about to spend 4 days fishing and don't want to take a chance of them not holding up, considering they're 6 years old. I keep them on a 3-bank charger year round, keep the water levels up, and only use my boat about 8 times throughout the season. No complaints on these batteries and I just hope the new ones hold up as well as the old ones did!

Purchased July 2020. First time out with small trolling motor it registered at 25% after charging and struggled to turn the motor. I figured it was my error and charge again. On try number two, despite reading full, it powered the motor less than five minutes and quickly showed as depleted. Likely bad cells out of the factory. Very poor showing for Duracell quality control. I've lost confidence in their products. Paying a bit more for a more reputable product going forward.

If I were to invent a battery that could stand up to a 36 month battery warranty I’d be a multi-millionaire. I have two boats, one has a huge house bank of 6 marine lead cell and 2 AGM’s for starting. The other has one AGM starter and 3 lead cell for trolling. Needless to say I seemed to be buying a battery every other month for some reason. Tried the Everstarts and they are terrible, lasting maybe 13 months at best. Tried Deka and had even worse results with them going out annually but they had a 18 month warranty. Then switched to Duracell from Sam’s and have had no trouble for the past 2 1/2 years. So far I’ve switched all on the large boat to Duracell and this weekend replaced the last P0S everstart on the smaller boat to Duracell. I hope these continue to work well for me and highly recommend. I will never give 5 stars because that would be the non-existent lifetime battery that we’re all searching for.

Both 2 for our RV, works great, no problems

Bought this and it was dead after two uses and placed on a battery tender to keep the battery. It was dead in 12 months, but just barely past the “1-year warranty” purchase date.

Just heard some alarm and went down to the basement and find out my newer(purchased just around 1yr or so) but went bad already. I'm going to Sam's tomorrow to complaint and hopefully they can work with me.

Installed in my fishing boat for trolling motor high end chargers monitoring systems battery went dead short in 13 minutes and boiled all of the water out of the battery.