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Lithium Battery Question - 50AH LiFeP04 for a 55# thrust Minn Kota?
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<blockquote data-quote="sonny.barile" data-source="post: 499412" data-attributes="member: 18154"><p>If you read the battery literature itself you will see that most list cycles as the life of the battery. It’s not totally apples to apples but you can kind of view a cycle as a use and recharge. (Duty cycle)</p><p></p><p>AGM batteries will be listed as 400/500 cycles typically.</p><p>That cycle is at 30 percent discharge at 10a draw. There is an industry standard used for the numbers.</p><p>If you do anything different with your use it has an affect on the life……..reduced cycles. Lead acid batteries like to be fully charged all the time. So even after a little use you should top them off. Any prolonged period of non-use while not fully charged shortens the life.</p><p></p><p>Lithium Iron Phosphate (Lifepo4) also list life cycles. It’s 5000/8000 cycles at 50 percent drain and 10a draw. Some of the marketing literature goes a little deeper and state lower life for more drain or higher draw. Most of the batteries have onboard management systems that cut you off at About 2 amps capacity because it won’t take a charge if you completely kill it. So you can technically get the majority of the stated power.</p><p></p><p>Voltage drop on lead acid will stop your 12 v trolling motor from working at the higher speeds when the voltage hits low 11’s. That will happen when you have about 40 percent left. Most Lifepo4 batteries will supply enough voltage until just about dead.</p><p></p><p>Now does that mean you should drain a lithium down to 10/20 percent? Probably not……but even if you do that regularly, it will still have 5/10 times the cycle life of a lead acid battery.</p></blockquote><p></p>
[QUOTE="sonny.barile, post: 499412, member: 18154"] If you read the battery literature itself you will see that most list cycles as the life of the battery. It’s not totally apples to apples but you can kind of view a cycle as a use and recharge. (Duty cycle) AGM batteries will be listed as 400/500 cycles typically. That cycle is at 30 percent discharge at 10a draw. There is an industry standard used for the numbers. If you do anything different with your use it has an affect on the life……..reduced cycles. Lead acid batteries like to be fully charged all the time. So even after a little use you should top them off. Any prolonged period of non-use while not fully charged shortens the life. Lithium Iron Phosphate (Lifepo4) also list life cycles. It’s 5000/8000 cycles at 50 percent drain and 10a draw. Some of the marketing literature goes a little deeper and state lower life for more drain or higher draw. Most of the batteries have onboard management systems that cut you off at About 2 amps capacity because it won’t take a charge if you completely kill it. So you can technically get the majority of the stated power. Voltage drop on lead acid will stop your 12 v trolling motor from working at the higher speeds when the voltage hits low 11’s. That will happen when you have about 40 percent left. Most Lifepo4 batteries will supply enough voltage until just about dead. Now does that mean you should drain a lithium down to 10/20 percent? Probably not……but even if you do that regularly, it will still have 5/10 times the cycle life of a lead acid battery. [/QUOTE]
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Lithium Battery Question - 50AH LiFeP04 for a 55# thrust Minn Kota?
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