![]() When compared to their sister cases, in starting or dual purpose, they appear to be "deep cycle" but when compared to a true deep cycle battery, such as a GC2 6V or a GEL battery they are not at all deep cycle. Many of these batteries do get marketed as deep cycle but it is marketing mumbo jumbo not a real deep cycling battery.Īlso keep in mind that Group 24, 27 & 31 batteries are also not a true deep cycle battery in flooded designs. Dyno does claim to make a deep cycle version but they are a very small West Coast company. Most all flooded 4D & 8D batteries are all dual purpose or starting. My Forum - Musings With Maine Sail (LINK) In summary the term deep cycle has been bastardized in the industry and is basically a bunch of bovine dung when used to describe typical 4D, 8D, Group 24, 27 & 31 12V batteries. This a bank of three Group 31 Odyssey TPPL AGM batteries. Scenes like this on OTR trucks are becoming the norm and 4D and 8D's once the norm here are a dying breed. Even the big OTR truck manufacturers have moved to parallel group 31's and some battery makers, such as US Battery, have even stopped making them all together. Done wrong and for the wrong reasons they are a massive hole in your wallet.įor the life of me I do not understand why anyone would pay 2¢ for an 8D or 4D unless you were trying to start a massive diesel in a sport fishing yacht. Done right, and for the right reasons, they are good batteries. Beyond that AGM's are quite picky about proper use and charging. Lifeline does make a "deep cycle" 4D or 8D but Deka does not, unless you consider 300 cycles "deep cycle". *They rate their GEL batteries at 700 more cycles than AGM. *They rate their 6V DC wets at 400 - 700 more cycles than AGM *They rate their 12V DC wets at 50 more cycles than AGM. That is not my data but Deka's own data across their own batteries. ![]() *NOTE: These are not what you will see in the "real world" except for the possibility of GEL. AGM Cycled to 50% = *300 Cycles (includes 4D & 8D) 12V Deep Cycle Flooded Cycled to 50% = *350 Cycles 6V Flooded Golf Cart Batteries Cycled to 50% = *700-1000 Cycles We wind up using batteries that were never intended for partial state of charge operation in a PSOC environment which results in considerably less cycles than what the manufacturers "lab" data suggests could potentially happen. The sad reality is with sailboats this does not always happen. Why? Because all battery manufacturers assume & recommend that you recharge to 100% SOC after each deep discharge. Only in-house manufacturer testing across their own batteries can be compared for guidelines. ![]() Most all of them are fantasy level data when applied to real world marine use. Actually there is, but no one seems to want to use it. Cross brand cycle life data is useless because there is no industry standard for testing. NOTE: Only ratings within a brand /manufacturer are useful. I will let Deka's own data speak for itself. Special shipping requirements are needed for shipping this battery, please contact us for details.Here's the text of Maine Sail's reply (at the bottom of that link - photo didn't come through):.Pow-R-Surge batteries are backed with a 24 Month Warranty! Special computer-aided design and manufacturing means more durability for heavy-duty line-haul trucks, buses, farm tractors and off-road equipment.Most of our commercial batteries contain premium "deep pocket" envelope separators, which protect the plates on all four sides to dramatically reduce shorting and extend service life.Anchor-locked elements with full-frame grids and tight-packed commercial plates resist the damaging effects of vibration, delivering more power-perpound than other batteries.Genuine calcium lead alloy provides longer waterless operation and extended battery life.This complete line of the toughest commercial product is specially engineered for durability while meeting high power ratings for heavy-duty engines. Svg Vector Icons : Mosquito/Bug Repellentĭemanding commercial equipment requires nothing less than the most powerful, reliable batteries.
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