![]() With each recharge during the partial state of charge testing, the Deka 8A31DTMs usable capacity (in amp hours) walked down at a reasonable pace compared to others, although it was slightly below its sister battery. Netting 104.8 amp hours from a 105-amp-hour battery is certainly an acceptable baseline capacity. The first Deka tested at 104.5 amp hours this shows good manufacturing consistency. Our second Deka test battery tested slightly below its rating with a baseline capacity of 104.8 amp hours. Some labels offer better warranties, so it can pay to compare. It is one of the least expensive AGM batteries you will find on the U.S. It is sold by Deka, West Marine, NAPA, and many Sams Clubs as a Duracell, OReilly Auto, Power-Tec, MK Battery, and numerous other smaller labels. Widely distributed under many different brand labels, this is perhaps the most popular AGM battery on boats today. The Deka/East Penn 8A31DTM is a hybrid, dual-purpose AGM battery. We had only one thin-plate, pure lead (TPPL) AGM in the first round, the Enersys Odyssey PC2150, and it earned a Recommended rating. We also wanted to test a thin-plate, pure lead AGM battery that we missed in the first round, Northstar Batterys Energy1 NSB-115-FTB (also sold as the Northstar NSB-100-FT Blue+). To double-check our findings, we decided to test a second Deka 8A31DTM. Some of the new absorbed glass mat batteries in our test never fully recovered to their pre-test capacity-and one in particular, the Deka 8ADTM, recovered a far smaller percentage of its original charge than the others. We then compared the capacity of each battery to its original capacity, before the partial state of charge test began. After completing 30 cycles, we used a multi-stage charging process to bring the batteries back up to full capacity. The discharge-recharge cycles were designed to mimic the recharging routine of a sailor who relies solely on his engine alternator to recharge his batteries when anchored. ![]() (See PS May 2015 online.) The object of the exercise was to demonstrate just how quickly sulfation, which is caused by keeping a battery in a partial state charge (PSOC), can reduce the capacity and eventually permanently ruin a good battery. Municipalities and corporations learn quickly the savings gained from utilizing these high performance sealed AGM maintenance free batteries.In our recent test of absorbed glass mat (AGM) batteries, we cycled five different batteries through 30 deep cycles to 11.7 volts but only partially recharged them for one hour after each discharge cycle at a charge rate of 46 percent of battery amp-hour capacity. Fleet operators know the cost of labor and how important it is to minimize disruption and revenue lost due to downtime. The NorthStar NSB-AGM 31M pure lead AGM technology delivers such high CCA ratings and incredible reserve capacity cycling ability that this just may be the last battery you ever buy for your vehicle! It will exceed conventional battery life expectancy reducing your overall cost of ownership. Compare to LifeLine GPL-31TĬompare the ever popular Optima Yellow Top D31 (8052-161) which has only 155 Min RC ![]() Powering your RV or your boats Out-Board motor, NorthStar leads the way. There are over 900 cycles at 50% depth of discharge (DOD) and over 400 cycles at 80% DOD. It can also be utilized for various back-up situations found in commercial oil fields and other industrial applications. The thin plate technology enables this battery to produce high amp hour capacity, reserve capacity, and cranking power! It is the perfect option for your RV, boat, fifth wheel, bus, truck or pickup. When you have something this great to share you need to be at the center of the battery universe. It was no accident in the naming of this exceptional company and it is no accident they are located in the Show Me State. Manufactured from 99.997% pure lead in state-of-the-art facilities found in the middle of the country, North Star batteries are like no other. The NSB-AGM-31M is designed to reduce your overall cost of ownership by delivering superior starting performance and exceptional deep cycle capabilities. Any purchase made from this listing will be sent the new ODX-AGM31M labeled battery.Ĭomes with standard SAE marine post, 3/8" threaded stud on the positive, 5/16" on the negative and meets exact BCI Group 31 requirements Enersys purchased NorthStar in 2019 and throughout 2021 has merged the NorthStar part numbers into the Odyssey Extreme Series.
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