escottl92 Posted November 30, 2019 Report Share Posted November 30, 2019 Question, I have AGM batteries and can hold good voltage competing, is there any benefit to switch to lithium’s? I do have big 3 and 320amp alt thanks Link to comment Share on other sites More sharing options...
bmwking Posted November 30, 2019 Report Share Posted November 30, 2019 if you're happy with what you have, stick with it. one advantage to lithium is weight savings vs agm. personally, i say lithium because it holds a stiffer voltage, rests higher, and outputs more consistently with less degradation of voltage compared to traditional lead-acid. but that's just my $0.02 I love my winston cells and 38120s Link to comment Share on other sites More sharing options...
escottl92 Posted November 30, 2019 Author Report Share Posted November 30, 2019 13 minutes ago, bmwking said: if you're happy with what you have, stick with it. one advantage to lithium is weight savings vs agm. personally, i say lithium because it holds a stiffer voltage, rests higher, and outputs more consistently with less degradation of voltage compared to traditional lead-acid. but that's just my $0.02 I love my winston cells and 38120s What are 38120? Link to comment Share on other sites More sharing options...
bmwking Posted November 30, 2019 Report Share Posted November 30, 2019 smaller cells than the typical 66160 cells. all the big name brands (limitless, JY, Wolfram, etc) use 66160 cells in their prebuilt batteries. it's infinitely cheaper to buy your own and buss them together. 66160s have higher aHratings than 38120s typically. but both are good in car audio. 38120s for example work well in mixed battery situations, like say you have an AGM under the hood for starting the car, you can add a bank of 38120s to supplement in the back without running into any drain issues. 66160s tend to like higher charge voltages, think like 15V, and they store at higher voltages than 38120s. if you add a bank of 66160s they will be constantly on a drain from your under hood agm. so you can either add a BMS to them to keep them all topped up and balanced, or keep them on a completely separate charge circuit. Join the DIY Lithium group on facebook, they have frequent group buys, deals, and a lot of other options on there to choose from. feel free to ask questions too, a lot of the guys there are super knowledgeable and helpful, but just be ready to deal with typical facebook snark 38120 - https://batteryhookup.com/products/4-headway-38120-hp-3-2v-8ah-lifepo4-lithium-batteries-25c-200a-super-cells 66160 - https://www.amazon.com/1pcs-Yinlong-2-3V-66160-Battery/dp/B07P51WZ2Z Link to comment Share on other sites More sharing options...
bmwking Posted November 30, 2019 Report Share Posted November 30, 2019 also, the 38120s you can run a bank of 40 cells (about $400) and it is a solid and stiff enough bank to hold for ~10k Link to comment Share on other sites More sharing options...
escottl92 Posted November 30, 2019 Author Report Share Posted November 30, 2019 Awesome info thank you for your help, I can get 38120 on DIY?? Link to comment Share on other sites More sharing options...
escottl92 Posted November 30, 2019 Author Report Share Posted November 30, 2019 Awesome info thank you for help Link to comment Share on other sites More sharing options...
bmwking Posted November 30, 2019 Report Share Posted November 30, 2019 3 hours ago, escottl92 said: Awesome info thank you for your help, I can get 38120 on DIY?? the best place to get the 38120s is that link i sent you, especially considering the bulk discounts they have. you can get custom made buss bars and holders/packs from guys on the facebook forum, or you can make one yourself. Link to comment Share on other sites More sharing options...
Joshdashef Posted December 1, 2019 Report Share Posted December 1, 2019 Take note of what operating ranges these perform best at, Headways go better with AGMs. Shouldn't run Yinglongs with AGMs. Also don't mix lithium! Each of these are different lithium types. Yinglongs (LTO chemistry) if you charge over 15v Headway (LifePO4 chemistry)if you charge under 15v (13-14) Building your own you save anywhere from 100-400, depending on how much you spend on an enclosure or bussing. SMD Tool Map (2022): https://www.stevemeadedesigns.com/board/topic/220267-smd-tool-map-2022/ My Port Size Calculator (in progress): https://www.stevemeadedesigns.com/board/topic/217087-port-size-calculator-in-progress/ Common Port Walls for a Slot Port: https://www.stevemeadedesigns.com/board/topic/217076-common-port-walls-why-it-matters-to-your-box/?tab=comments#comment-3240313 Link to comment Share on other sites More sharing options...
escottl92 Posted December 1, 2019 Author Report Share Posted December 1, 2019 Thank you, where can I buy headaways? Link to comment Share on other sites More sharing options...
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