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<blockquote data-quote="hispls" data-source="post: 8742321" data-attributes="member: 614752">IF you plan to use only 15AH you are looking at 20C discharge and 16C charge (assuming you get a 250A alternator).&nbsp; I might attempt that current in and out with genuine Toshiba SCiB cells.&nbsp; I could never get a straight answer out of any of those car audio branded battery companies on their tailor made battery banks.&nbsp;&nbsp; I would look into YingLong or LiShen Lithium Titanate batteries.&nbsp; I&#039;m pretty sure some online sellers sell YingLong 40AH cells + nicely machined bus bar kits.&nbsp; 40AH bank would be pushing it with YingLong, might be a little better with Lishen (I&#039;m trying to get some myself whenever my guy in China gets more to test them).&nbsp;&nbsp; I&#039;d do 80AH to be safe for 3000-4000W amp.&nbsp; LTO batteries are meant to last 25,000 cycles at recommended C rating.&nbsp;&nbsp; Cycle life roughly halves as you double current draw.&nbsp;&nbsp; In layman&#039;s terms, the smaller the bank you use to try to draw 300A the more quickly it will fail.&nbsp; I would not recommend any of those off-the-shelf batterys from the battery brands until I knew which cells they used and could see the real specs from manufacturer.</blockquote>

[QUOTE="hispls, post: 8742321, member: 614752"] IF you plan to use only 15AH you are looking at 20C discharge and 16C charge (assuming you get a 250A alternator). I might attempt that current in and out with genuine Toshiba SCiB cells. I could never get a straight answer out of any of those car audio branded battery companies on their tailor made battery banks. I would look into YingLong or LiShen Lithium Titanate batteries. I'm pretty sure some online sellers sell YingLong 40AH cells + nicely machined bus bar kits. 40AH bank would be pushing it with YingLong, might be a little better with Lishen (I'm trying to get some myself whenever my guy in China gets more to test them). I'd do 80AH to be safe for 3000-4000W amp. LTO batteries are meant to last 25,000 cycles at recommended C rating. Cycle life roughly halves as you double current draw. In layman's terms, the smaller the bank you use to try to draw 300A the more quickly it will fail. I would not recommend any of those off-the-shelf batterys from the battery brands until I knew which cells they used and could see the real specs from manufacturer. [/QUOTE]

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