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IT NewsBuying Large LiFePO4 Batteries: How Cheap is Too Cheap? - It’s a well-known factoid that batteries keep getting cheaper while capacity incre... - <a href="https://hackaday.com/2025/08/07/buying-large-lifepo4-batteries-how-cheap-is-too-cheap/" rel="nofollow noopener" translate="no" target="_blank">https://hackaday.com/2025/08/07/buying-large-lifepo4-batteries-how-cheap-is-too-cheap/</a> <a href="https://schleuss.online/tags/lithiumbattery" class="mention hashtag" rel="nofollow noopener" target="_blank">#lithiumbattery</a> <a href="https://schleuss.online/tags/batteryhacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#batteryhacks</a> <a href="https://schleuss.online/tags/teardown" class="mention hashtag" rel="nofollow noopener" target="_blank">#teardown</a> <a href="https://schleuss.online/tags/lifepo4" class="mention hashtag" rel="nofollow noopener" target="_blank">#lifepo4</a>

woollypigsMojn, can I pick your brains. We got 300Ah battery but we are finding that it isn't enough for our use in our motorhome aka HQ. We would like to add MORE POWER, but there's not enough space next to the original battery. We got plenty of space elsewhere. Would this be possible to have two "banks" of batteries working as one? (I think about 3-4m cable run is needed, if possible)<a href="https://sudomakecake.com/tags/SolarPower" class="mention hashtag" rel="nofollow noopener" target="_blank">#SolarPower</a> <a href="https://sudomakecake.com/tags/DIY" class="mention hashtag" rel="nofollow noopener" target="_blank">#DIY</a> <a href="https://sudomakecake.com/tags/Battery" class="mention hashtag" rel="nofollow noopener" target="_blank">#Battery</a> <a href="https://sudomakecake.com/tags/LiFePO4" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiFePO4</a> <a href="https://sudomakecake.com/tags/12v" class="mention hashtag" rel="nofollow noopener" target="_blank">#12v</a> <a href="https://sudomakecake.com/tags/OffGrid" class="mention hashtag" rel="nofollow noopener" target="_blank">#OffGrid</a> <a href="https://sudomakecake.com/tags/MotorHome" class="mention hashtag" rel="nofollow noopener" target="_blank">#MotorHome</a>

ℒӱḏɩę :blahaj: 💾I have some refined <a href="https://tech.lgbt/tags/lithium" class="mention hashtag" rel="nofollow noopener" target="_blank">#lithium</a> available. It's free. It's right there to extract, and you don't even need a bulldozer!All you need to do is come and get it. And make more <a href="https://tech.lgbt/tags/batteries" class="mention hashtag" rel="nofollow noopener" target="_blank">#batteries</a> . <a href="https://tech.lgbt/tags/LFP" class="mention hashtag" rel="nofollow noopener" target="_blank">#LFP</a> <a href="https://tech.lgbt/tags/LiFePO4" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiFePO4</a>

Wordmark<a href="https://social.wildeboer.net/@jwildeboer" class="u-url mention" rel="nofollow noopener" target="_blank">@jwildeboer</a> it's a lot of effort... it took me 3 years and loads of experiments with <a href="https://mas.to/tags/batteries" class="mention hashtag" rel="nofollow noopener" target="_blank">#batteries</a> to get to a system that won't burn down anything :D (go with <a href="https://mas.to/tags/leadGel" class="mention hashtag" rel="nofollow noopener" target="_blank">#leadGel</a> 100Ah Accurat instead of <a href="https://mas.to/tags/LiFePo4" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiFePo4</a> that might run amok (had no luck with that, including: who is gonna recycle it? no one, while lead batteries are easy to return)imho the problem is: if there is no community of aware people that help aware people... yes i will can do everything alone but it's taff

Kevin Karhan :verified:<a href="https://mastodon.derg.nz/@anthropy" class="u-url mention" rel="nofollow noopener" target="_blank">@anthropy</a> interestingly you get that curve minus the top issues with <a href="https://infosec.space/tags/LiFePO4" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiFePO4</a> as well...

Wordmark<a href="https://social.heise.de/@ct_Magazin" class="u-url mention" rel="nofollow noopener" target="_blank">@ct_Magazin</a> well the rest of the <a href="https://mas.to/tags/world" class="mention hashtag" rel="nofollow noopener" target="_blank">#world</a> does not care about <a href="https://mas.to/tags/German" class="mention hashtag" rel="nofollow noopener" target="_blank">#German</a> <a href="https://mas.to/tags/safety" class="mention hashtag" rel="nofollow noopener" target="_blank">#safety</a> rules and <a href="https://mas.to/tags/lobbyism" class="mention hashtag" rel="nofollow noopener" target="_blank">#lobbyism</a>, they just want good productsActually had the problem <a href="https://mas.to/tags/usecase" class="mention hashtag" rel="nofollow noopener" target="_blank">#usecase</a> with a 15kWh <a href="https://mas.to/tags/LiFePo4" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiFePo4</a> pack that 2 cells had to be swapped (Bad quality?)<a href="https://mas.to/tags/Nissan" class="mention hashtag" rel="nofollow noopener" target="_blank">#Nissan</a> <a href="https://mas.to/tags/Leaf" class="mention hashtag" rel="nofollow noopener" target="_blank">#Leaf</a> <a href="https://mas.to/tags/battery" class="mention hashtag" rel="nofollow noopener" target="_blank">#battery</a> module swaps are done by <a href="https://mas.to/tags/youtubers" class="mention hashtag" rel="nofollow noopener" target="_blank">#youtubers</a> and <a href="https://mas.to/tags/Tesla" class="mention hashtag" rel="nofollow noopener" target="_blank">#Tesla</a> <a href="https://mas.to/tags/batterypack" class="mention hashtag" rel="nofollow noopener" target="_blank">#batterypack</a> repair is now done by 3rd party on a daily basis

Martin Boller :debian: :tux: :freebsd: :windows: :mastodon:Go home <a href="https://infosec.exchange/tags/DMI" class="mention hashtag" rel="nofollow noopener" target="_blank">#DMI</a> You're drunk. I need the sun to shine to charge my new batteries... <a href="https://infosec.exchange/tags/PhotoVoltaic" class="mention hashtag" rel="nofollow noopener" target="_blank">#PhotoVoltaic</a> <a href="https://infosec.exchange/tags/LiFePo4" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiFePo4</a> <a href="https://infosec.exchange/tags/Batteries" class="mention hashtag" rel="nofollow noopener" target="_blank">#Batteries</a> faster (Still bringing in 2.8kW so not bad but I'm greedy and want the batteries balanced ASAP :)

RommudohMy <a href="https://social.tchncs.de/tags/BMS" class="mention hashtag" rel="nofollow noopener" target="_blank">#BMS</a> <a href="https://social.tchncs.de/tags/PCBs" class="mention hashtag" rel="nofollow noopener" target="_blank">#PCBs</a> arrived from <a href="https://aisler.social/@aislerhq" class="u-url mention" rel="nofollow noopener" target="_blank">@aislerhq</a> and they look nice. I designed it because I couldn't find 3S BMS for <a href="https://social.tchncs.de/tags/LiFePO4" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiFePO4</a> cells and didn't like the voltage thresholds of the cheap <a href="https://social.tchncs.de/tags/LiIon" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiIon</a> ones. It uses the <a href="https://social.tchncs.de/tags/BQ77915" class="mention hashtag" rel="nofollow noopener" target="_blank">#BQ77915</a> chip from <a href="https://social.tchncs.de/tags/TexasInstruments" class="mention hashtag" rel="nofollow noopener" target="_blank">#TexasInstruments</a>. Size is 63x50mm. While fetching all components according to the BOM, I noticed the <a href="https://social.tchncs.de/tags/diode" class="mention hashtag" rel="nofollow noopener" target="_blank">#diode</a> had the <a href="https://social.tchncs.de/tags/footprint" class="mention hashtag" rel="nofollow noopener" target="_blank">#footprint</a> SOT-323 assigned. I only have SOT-23 ones :blobcatgoogly: I'm glad that I can still make it fit, and the third leg isn't used at all (it's a single diode). Can't wait to find some time to finish soldering a few and try them out. It supports 3S up to 5S, and I added <a href="https://social.tchncs.de/tags/silkscreen" class="mention hashtag" rel="nofollow noopener" target="_blank">#silkscreen</a> part to mark how it's configured. The back has detailed instructions, so I don't forget them.

Wordmark<a href="https://tech.lgbt/@Lydie" class="u-url mention" rel="nofollow noopener" target="_blank">@Lydie</a> yes <a href="https://mas.to/tags/JKBMS" class="mention hashtag" rel="nofollow noopener" target="_blank">#JKBMS</a> IF MONITORED regularly (can only do <a href="https://mas.to/tags/bluetooth" class="mention hashtag" rel="nofollow noopener" target="_blank">#bluetooth</a> with app from <a href="http://www.enjpower.com/" rel="nofollow noopener" translate="no" target="_blank">http://www.enjpower.com/</a> <a href="https://mas.to/tags/enjpower" class="mention hashtag" rel="nofollow noopener" target="_blank">#enjpower</a>) can report bad cells as going way too high way to fast (4.3V???) <a href="https://mas.to/tags/datasheed" class="mention hashtag" rel="nofollow noopener" target="_blank">#datasheed</a> <a href="https://mas.to/tags/eve" class="mention hashtag" rel="nofollow noopener" target="_blank">#eve</a> <a href="https://mas.to/tags/LiFePo4" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiFePo4</a> <a href="https://www.battery-germany.de/wp-content/uploads/2022/02/LF280K-280Ah-Product-Specification-Version-B.pdf" rel="nofollow noopener" translate="no" target="_blank">https://www.battery-germany.de/wp-content/uploads/2022/02/LF280K-280Ah-Product-Specification-Version-B.pdf</a> <a href="https://ultimate-solar.com/wp-content/uploads/2025/04/LifePo4-EVE-Datasheed-Datenblatt-LF280K-280Ah-Product-Specification-Version-B-prismatic-prismatisch.pdf" rel="nofollow noopener" translate="no" target="_blank">https://ultimate-solar.com/wp-content/uploads/2025/04/LifePo4-EVE-Datasheed-Datenblatt-LF280K-280Ah-Product-Specification-Version-B-prismatic-prismatisch.pdf</a> this guy and others on <a href="https://mas.to/tags/youtube" class="mention hashtag" rel="nofollow noopener" target="_blank">#youtube</a> keep promoting <a href="https://mas.to/tags/eve" class="mention hashtag" rel="nofollow noopener" target="_blank">#eve</a> <a href="https://mas.to/tags/lifepo4" class="mention hashtag" rel="nofollow noopener" target="_blank">#lifepo4</a> <a href="https://www.youtube.com/@Akkudoktor/videos" rel="nofollow noopener" translate="no" target="_blank">https://www.youtube.com/@Akkudoktor/videos</a>this is what a bad cell looks like vendor refuses <a href="https://mas.to/tags/warranty" class="mention hashtag" rel="nofollow noopener" target="_blank">#warranty</a> :( voltage too fast too low or too high (<a href="https://mas.to/tags/BMS" class="mention hashtag" rel="nofollow noopener" target="_blank">#BMS</a> stops discharging or charging to prevent <a href="https://mas.to/tags/BatteryFIRE" class="mention hashtag" rel="nofollow noopener" target="_blank">#BatteryFIRE</a>)

Wordmark<a href="https://mstdn.social/@klimareporter" class="u-url mention" rel="nofollow noopener" target="_blank">@klimareporter</a> <a href="https://mastodon.green/@VQuaschning" class="u-url mention" rel="nofollow noopener" target="_blank">@VQuaschning</a> es ist möglich aber nicht mit Gelaber sindern mit Geld aus der <a href="https://mas.to/tags/Schweiz" class="mention hashtag" rel="nofollow noopener" target="_blank">#Schweiz</a> and <a href="https://mas.to/tags/Batteries" class="mention hashtag" rel="nofollow noopener" target="_blank">#Batteries</a> <a href="https://mas.to/tags/Batterie" class="mention hashtag" rel="nofollow noopener" target="_blank">#Batterie</a> <a href="https://mas.to/tags/Battery" class="mention hashtag" rel="nofollow noopener" target="_blank">#Battery</a> that actually work (leider gibt es im <a href="https://mas.to/tags/LiFePo4" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiFePo4</a> Bereich scheinbar MASSIVE Qualitätsprobleme???)<a href="https://www.pv-magazine.de/2025/05/23/spatenstich-fuer-redox-flow-speicher-mit-800-megawatt-1600-megawattstunden-in-der-schweiz/" rel="nofollow noopener" translate="no" target="_blank">https://www.pv-magazine.de/2025/05/23/spatenstich-fuer-redox-flow-speicher-mit-800-megawatt-1600-megawattstunden-in-der-schweiz/</a>

Wordmark<a href="https://fediscience.org/@martinvermeer" class="u-url mention" rel="nofollow noopener" target="_blank">@martinvermeer</a> <a href="https://mastodon.energy/@Sustainable2050" class="u-url mention" rel="nofollow noopener" target="_blank">@Sustainable2050</a> currently running this setup<a href="https://mas.to/@wordmark/114114574548334923" rel="nofollow noopener" translate="no" target="_blank">https://mas.to/@wordmark/114114574548334923</a> It is okay to run 2000W washing machine but <a href="https://mas.to/tags/China" class="mention hashtag" rel="nofollow noopener" target="_blank">#China</a> <a href="https://mas.to/tags/LiFePo4" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiFePo4</a> cheated on <a href="https://mas.to/tags/battery" class="mention hashtag" rel="nofollow noopener" target="_blank">#battery</a> <a href="https://generation-nachhaltigkeit.de/lifepo4-nicht-alles-ist-gueteklassea-batterie-betrug-made-in-china-china-mischt-gradeb-schlechte-zellen-mit-gradea-und-verkauft-alles-als-gradea/" rel="nofollow noopener" translate="no" target="_blank">https://generation-nachhaltigkeit.de/lifepo4-nicht-alles-ist-gueteklassea-batterie-betrug-made-in-china-china-mischt-gradeb-schlechte-zellen-mit-gradea-und-verkauft-alles-als-gradea/</a> and it can be done with less than 2000 bucks The <a href="https://mas.to/tags/future" class="mention hashtag" rel="nofollow noopener" target="_blank">#future</a>? <a href="https://m.youtube.com/watch?v=x0G0J_enNPs" rel="nofollow noopener" translate="no" target="_blank">https://m.youtube.com/watch?v=x0G0J_enNPs</a>

Dismal Manor Gang<a href="https://mastodon.social/@GoatsLive" class="u-url mention" rel="nofollow noopener" target="_blank">@GoatsLive</a> may want to give GoldenMateEnergy.com a look-see. GoldenMateEnergy got its start making lead-acid and LiFePO4 batteries for trolling, mobility scooters, golf carts, solar and marine solar, etc. UPS product line is a new one for them, maybe 2 years old. They sell direct from a Shopify storefront and at Amazon.The packaged batteries are made to drop in for various vehicle applications. BMS is internal to the package. <a href="https://mastodon.online/tags/LiFePO4" class="mention hashtag" rel="nofollow noopener" target="_blank">#LiFePO4</a> <a href="https://mastodon.online/tags/batteries" class="mention hashtag" rel="nofollow noopener" target="_blank">#batteries</a> for <a href="https://mastodon.online/tags/mobility" class="mention hashtag" rel="nofollow noopener" target="_blank">#mobility</a> and off-grid solar.

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