Dirt Cheap Lithium Battery! Cheaper than Lead Acid. You will love this thing!

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  • Published on Jul 16, 2019
  • All sources below are out of stock, including the one I bought these batteries from. DO NOT PURCHASE THE BATTERY WITH MISSING BMS CABLES!! People are actually bidding on it, and it has been over discharged and the red light is on. This thing is worthless! You need to find good condition valence batteries on ebay. More will be in stock in due time, so keep an eye on ebay listings. And yes, the price has increased for many listings ever since I made this video. Most sources are completely out of stock. If you want a cheap lithium battery that is not used, check out my website: www.mobile-solarpower.com/lithium-batteries.html
    Valence Source: www.ebay.com/itm/Valence-u-charge-RT-Series-U1-12RT-LiFePO4-12-8V-40Ah-Lithium-Ion-Battery/372717154042?_trkparms=aid%3D1110001%26algo%3DSPLICE.SIM%26ao%3D1%26asc%3D20131231084308%26meid%3Dbcb5d6ac853844a38435c09df03dd375%26pid%3D100010%26rk%3D2%26rkt%3D12%26sd%3D254302874779%26itm%3D372717154042%26pg%3D2047675&_trksid=p2047675.c100010.m2109
    Valence Source 1: rover.ebay.com/rover/1/711-53200-19255-0/1?icep_id=114&ipn=icep&toolid=20004&campid=5338408166&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2FValence-u-charge-RT-Series-U1-12RT-LiFeMgPO4-12-8V-14v-40Ah-Lithium-Ion-Battery%2F163782961173%3F_trkparms%3Daid%253D1110001%2526algo%253DSPLICE.SIM%2526ao%253D1%2526asc%253D20131231084308%2526meid%253Dc4cd5953310741acaf35ba475ebeae5b%2526pid%253D100010%2526rk%253D1%2526rkt%253D12%2526sd%253D323856788291%2526itm%253D163782961173%2526pg%253D2047675%26_trksid%3Dp2047675.c100010.m2109
    Valence Source 2: rover.ebay.com/rover/1/711-53200-19255-0/1?icep_id=114&ipn=icep&toolid=20004&campid=5338408166&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2FValence-u-charge-RT-Series-U1-12RT-LiFeMgPO4-12-8V-40Ah-Lithium-Iron-Battery%2F254302874779%3Fepid%3D696740128%26hash%3Ditem3b35a1ec9b%3Ag%3AjhQAAOSwSXRc9TYT
    Valence Source 3: amzn.to/2kivyp5
    Manual: mrbill.homeip.net/downloads/userGuideValenceRT.pdf
    Check out my latest best-selling book on off-grid solar:
    amzn.to/2Aj4dX4
    Does off-grid solar confuse you? Check out my website for pre-calculated packages, suggested components and much more! www.mobile-solarpower.com/
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Comments • 1 041

  • DIY Solar Power with Will Prowse

    For those commenting who did not watch the video above:
    Yes they are out of stock.
    Yes I bought them for $300 for 2.
    Yes there are other higher priced listings. Don't buy them.
    Yes it has a BMS. Please watch the video to learn this.
    Every time a battery or something does well in my video, it's out of stock within a hour. Or 3 hours max. Happens nearly every time. Be sure to hit the bell so you are notified when my videos are posted unless you will miss out on future deals.
    There will be more batteries to come. I have seen huge listings for these batteries and NO ONE bought them for weeks. Now that this video is up, we need to fight for them. It's a bummer, but that's the way it is. I will update the links on this video whenever I see a new listing.
    Thanks :) I love mine! So glad I got them early on haha!
    Also!! If you need a super cheap lifepo4 battery, the next best option is the ruixu, which can be found here: www.mobile-solarpower.com/lithium-batteries.html
    I update the links on my website DAILY and am always checking for new sources, so please check it if you want a good deal.

    • Andy Pandy
      Andy Pandy Day ago

      I can get them for less than $100 each new :) My lead acid batteries are listed at about $400 of your dollars each, I paid $15 each, used, but perfect, just got lucky... no idea why I'm bragging, but there you go :)

    • Zachary Stewart
      Zachary Stewart Day ago

      Are you SURE they have overcurrent protection? I read the manual. Don't see over-current protection. It says they have low voltage, high temp protection yes. But not overcurrent? I'd LOVE to be wrong on this! It'd mean that I'd be fine to squeeze 1500 watts out of 4 of these in parallel, currently, my 40A breakers flip at 1000 watts though.

    • Zachary Stewart
      Zachary Stewart Day ago

      @Deepak k The bulk of RV systems run at 12V. Going to 24 does let you use thinner wires but makes you need to look for all 24v equipment, which is tough to find.

    • Karla Brewster
      Karla Brewster 3 days ago

      None of the references are available

  • richard leach
    richard leach 15 minutes ago

    I connect 2 12 volt in parallel, connected solar across the two batterys ,drew power the same way, yet one battery went dead
    Both batterys are new and lead acid. One staying full one drained.

  • Gabriel Averell
    Gabriel Averell Hour ago

    Can these batteries be used for electric bicycle motors?

  • Crusty Rusty
    Crusty Rusty 5 hours ago

    Dude your voice sounds like Reid from Criminal Minds

  • jonno Rousseau
    jonno Rousseau 12 hours ago

    Great video. I'm guessing that these would be perfect for a sailboat solar installation, probably running 2× 330 watt panels??

  • Robert Johnson
    Robert Johnson 13 hours ago

    Did you say that those batteries are used?

  • Deb Wilson
    Deb Wilson 17 hours ago

    Do the loose ends on the battery balancing cables need to be connected to something?

  • ACTS
    ACTS 22 hours ago

    It's just Crazy! Crazy, crazy, crazy. Crazy, man CRAZY! Crazy! Crazy! Crazy! Really, really nice but CRAZY!!!

  • Papepo Mamemo
    Papepo Mamemo 23 hours ago

    they are cheat because lithium has got life spam.

  • Inga Huff
    Inga Huff 23 hours ago

    I don’t see the link to the site you purchased yours from. Please share)

  • Inga Huff
    Inga Huff 23 hours ago

    I am definitely wanting to get 2-4 of these. Great video

  • eBoarder75
    eBoarder75 Day ago

    I have these batteries but in the 138aH size. I have a Victron SmartSolar charger and was wondering what are the absorption and float voltage settings? I currently using the preset Victron SmartSolar setting of absorb 14.2V and float 13.5V. I thought it was a bit low don't you think? Thanks again in advance!

  • Dan az
    Dan az Day ago

    Really only 40 amp HR batteries? My one battery has 1500 amp hrs. It it cost half that at comparable amp hrs.

    • Blake
      Blake 19 hours ago

      Really ... A 1500ah battery I'd love too see that .. you lift it with a forklift or something ?

  • Joe Shmoe
    Joe Shmoe Day ago +1

    The new (old technology) salt water batteries look very promising. Edison batteries can be 100 years old but they still work today.

  • terry waller
    terry waller Day ago

    Dirt cheap? Have you ever bought dirt? It definitely isn't cheap!

  • groovetrain2010
    groovetrain2010 Day ago +1

    U keep repeating yourself it's annoying! !!

  • Adnan Fnaish
    Adnan Fnaish Day ago

    No use capacitors dirt cheap

  • John Meegan
    John Meegan Day ago

    Hopefully this information will come in handy

  • Kirk Oliver
    Kirk Oliver Day ago

    I sure wish the price of used batteries would come back down. Your original price was fantastic, but now I feel I am being pushed out of the market. So much more and even the freight seems to have skyrocketed. :(

  • Scott Kentfield
    Scott Kentfield Day ago +1

    Hiya Will, just discovered your channel, feel like I am back in college in a class I am really interested in, actually been pausing the video and taking notes.. Been binge watching for the last week or so.. I have a new obsession, my wife's words, I think of it as a hobby... Been hitting Amazon and Ebay pretty hard, packages are rolling in.. Looking forward to reading your book, and I will absolutely be leaving a review... After the rush on the Valence U1-12RT, I purchased a pair of Ironworks 12.8V LiFePO4 40Ah Batteries advertised as "same as Valence U1-12RT Medical"
    The specs seem to be the same, they have a RJ45 jack not sure what use it might be? I assume it is for the intended equipment would be able to monitor battery status with it? I have not been able to find any information whatsoever about this brand, have you ever heard of them? Opinions? Also have a offer in on the 800w MPP Solar unit.. I saw the 1k unit that is $100.00 cheaper, but it is 230v and I don't know enough yet to make a informed decision if this would fit my needs, I am guessing that wire costs would increase a bit.. I have been a nomad at heart my entire life, and plan to start living the life in regular extended vacations.. Your videos have been a big part of my decision to make the time... You Sir are a inspiration, love your views on finances and outlook on life in general... Be well..
    Scott

  • Mike Stone
    Mike Stone Day ago

    Still too expensive for this ol' boy. Have to wait until the batteries come down to COST EFFECTIVE. Though the life of these are long I still can't justify 2k for 200ah.

  • 1wor1d
    1wor1d Day ago +2

    Did I just watch battery porn??

  • hanford brace
    hanford brace Day ago

    Where can I get an easy diagram of how to make an electrical system with lithium batteries for a travel trailer and still use power source when plugged into shore power? I enjoyed your video and am fascinated with these systems and could a beginner like me set one up! Thanks.

  • Off Grid Texas Homestead

    You don't connect both your positive and negative leads going to the inverter or charge controller to just one battery. You are supposed to connect the positive to one battery and the negative to the other battery, or other end of the battery bank. Use ohms law. Think of them as water tanks. You are pulling water from one tank and water has to flow from other tank to the tank you are drawing water from. There is resistance to flow from one tank to the other, same with batteries. To keep them balanced, you connect to each end of the bank and draw energy equally from all the batteries. As you have it now, everything you are going to draw out if the battery is coming from the one battery you have it connected to.

  • solarsynapse
    solarsynapse 2 days ago

    Looks like the AGM is still the better deal by far.

  • Ernest Reichardt
    Ernest Reichardt 2 days ago

    Well Amazon Wants 450 dollars And 30 dollars shipping for these batteries now 8/18/19 for what they are calling refurbish Valences batters and I can get new batteries for that price !

  • Zofoblues Zofoblues
    Zofoblues Zofoblues 2 days ago

    Ty for this. New Sub Here.

  • Specialized 29er
    Specialized 29er 3 days ago

    we understand, you cheap and easy : )

  • Kevin Beasley
    Kevin Beasley 3 days ago

    Are you the Plantar Fasciitis guy???

  • Zachary Stewart
    Zachary Stewart 3 days ago +2

    Will, (or others) hold on, are you sure they have internal over current protection? I read the Users Information and I didn't see that specifically.

    Is says they have over-voltage, over-temperature and over-discharge protection, but I don't see anything on over-current. Certainly seems to have the ability to shut down, and to measure current, so seems like it could do this, but does it?

    I have mine on 40A DC breakers, which would have blown instantly if I'd have done what you just did! I have FOUR in parallel and they trip the breakers if I pull much over 1,000 watts off the inverter. If the batteries were each supplying an equal share of the current this wouldn't happen. (unless the breakers aren't really 40A - note that 40A blade fuses do NOT blow) But that's not what happens, one battery apparently supplies most of the current, trips its breaker, this overburdens the other three and about two seconds later the other 3 trip. I can actually influence which one trips first by giving it a lower gauge wire! It's that "unstable".

    Buuuut, I'd love to find out they can really really handle their own overcurrent conditions by shutting off their own current flow! Maybe they'd even do it in a PWM fashion! Then I could feel safe to remove those breakers and easily power my induction stove to its full 1500W capacity.

  • Vishan Koendji
    Vishan Koendji 3 days ago +2

    Can you open the battery and show us what inside the battery is
    ?

  • Z-speed
    Z-speed 4 days ago +1

    Supporting your channel!!@

  • webmastir
    webmastir 4 days ago +1

    For dummies, like me, is there a way to test the used battery to know if it's good?

  • Tim Roberts
    Tim Roberts 4 days ago

    Great advice! Will these work in 48 volt golf carts?

  • Devon Hickmott
    Devon Hickmott 4 days ago

    are these capable of being connected in series-parallel? would be great for my old golf cart

  • Jonathan Baldwin
    Jonathan Baldwin 5 days ago +1

    This is so cool! I have an Emphase microinverter system I installed myself. If I wanted to add these batteries for backup power what would be the process? I would want my panels to be able to charge the batteries and produce that syne wave.

  • douglas eddy
    douglas eddy 5 days ago +1

    Can any of these be used in a typical gas-powered car with an alternator charging system?

  • Jason Chan
    Jason Chan 5 days ago +1

    Do you have a link for the watt meter for battery

  • Karzan Kerkuki
    Karzan Kerkuki 5 days ago

    Very cool your eyes 😍

  • Maxim Maximov
    Maxim Maximov 5 days ago

    Thank you for the video. Cool! Are you still in San Diego?

  • jeanneewing
    jeanneewing 5 days ago +1

    Will, I love your videos. I too bought used batteries from a hospital,, but mine are Panasonic and have L terminals, and I don’t know what cables to use to connect them. Can you do a video on that for me. Thanks

  • Robert Moore
    Robert Moore 5 days ago

    i have a project with 2,544 valance 12v 1,766wH 138aH LiFePo4 batteries.
    i can tell you all about how those batteries work.
    also .. that company is now Lithium Werks

    • Robert Moore
      Robert Moore 4 days ago

      @top 5 those are mostly like boats, forklifts, buses...ect..
      They are just now branching into energy storage. I'm pretty sure my project had a lot to do with that.

    • top 5
      top 5 4 days ago +1

      @Robert Moore thanks for all the info. Your project sounds interesting. I am not sure what my used battery was used for before I bought it.

    • Robert Moore
      Robert Moore 5 days ago

      @top 5 if you just don't wanna/cant get your hands on that... to be safe charge it to 13.4v and then let it rest for a few hrs... it will internally balance .... (burn each cell bank with resistors to 3.36v) then hit it again at 5a to ‭14.1‬ .... the closer to the top these get, the faster they go... same for the bottom....and they don't wanna be stored at high or low charge for long times. keep or rest them between 20% and 80%ish... 10v at the terminal is a dead ass battery..
      if you see a red flashing light on that battery ..that's no good... its prob over or under charged...it should be green
      or no light at all.... the board in the side of that thing stops working somewhere under 10v... most times you can wake them back up by applying 13v-14- charger...
      but every time you do that... your damaging the battery..
      also the bms can open the string at critical low voltage .
      the B connector is for "battery side coms proprietary modbus" and CanBus output to plc.. also analog voltage and soc output.. and bms and battery coms power..
      the A connector is where it can control external relays,contactors,chargers,,,ect... we dont use the A connector at all... we use the can bus info to have our PLC's do the rest.

    • top 5
      top 5 5 days ago

      @UCnOFZJXVJWlmOEJ4Fx6Jxgg thanks for the info. I don't have the software but it would be very cool to pull up the info about the battery. I might buy a second on to make a 24v system but right now I am only using one. I looked all over the internet for the software but could not find it. I would like to know how many cycles and the mfg date of the battery.

  • Martin Hensley
    Martin Hensley 6 days ago +1

    Not sure i should ask this but can you use these in a car and have the cars alternator charge them for a audio system

  • Gary Schoonmaker
    Gary Schoonmaker 6 days ago

    The reason the batteries are so good is because they get chanced out on a schedule in Hospital or other med machines. Schedule is usually in months or years?? Not usuage. Used batteries from NYC will be different then Fargo, ND

  • JRLM
    JRLM 6 days ago +3

    he said solar panels are cheap LMAO!

    • Steve Strickland
      Steve Strickland 3 days ago

      @JRLM those friggin batteries i need thats gonna cost out the ass to buy... figured i need at least dozen 1000ah batteries and those puppies aint cheap for sure

    • Steve Strickland
      Steve Strickland 3 days ago

      @JRLM 20 panels at the place i just mentioned would be around a grand plus a little for shipping unless u live nearby..thats over 5000w of solar.. i get about 300 kwh off my elec bill for only 500w system,, 5000w would not only cover my whole 150$ bill every month.. prolly put some juice back on the grid and get a check in the mail , saving up the cash to get all that i need to do just that

    • JRLM
      JRLM 3 days ago

      TheMrKrause their expensive.

    • TheMrKrause
      TheMrKrause 3 days ago

      Panels are much less expensive than they used to be... cheap is relative. A new lofepo4 100ah battery might run you 1,000$ but a controller might only cost you 20$ and a solar panel under 100$. In the context presented... I would say it was correct and appropriate to say cheap.

    • Steve Strickland
      Steve Strickland 5 days ago

      place out in arz selling used 250w panels for less then a 100 each...

  • Enrique Atentar
    Enrique Atentar 7 days ago +2

    Bro can you make an experiments? about 48volt using super capacitor for e bikes because the regular weight of China ebike battery is 10kg or more.

  • Steven Austin
    Steven Austin 7 days ago

    Possibly keep your hands away from the terminals while making videos?

  • Robert Drinkall
    Robert Drinkall 7 days ago +5

    Sadly in the EU it's against the law to sell used batteries, they have to go to a licensed recycler.

  • Strayzshadow
    Strayzshadow 8 days ago

    Even as used batteries they are very high quality. As a FYI New these are selling from $900.00 to 1200.00 each. At the hospital that I work at I have seen units that are 8+ years old. I have spoken to the factory tech support and engineer he states that they have units that are over 10 years old and still running at top performance. You might look in to the charging head units that are made by triplight if you can find them, or scavenge them from the medical carts that the batteries are pulled from.

  • xlioilx
    xlioilx 8 days ago +1

    What devices are they in so I can rob my hospital?

  • xlioilx
    xlioilx 8 days ago

    none on ebay at all.. too many people bought after watching this.

  • Karl Pfistenhammer
    Karl Pfistenhammer 8 days ago

    I work in the telecommunications industry. Once, after a site took lightning, we had multiple battery failures in the -48V battery system. Solar and wind systems are going to take lightning hits. Do you really think it's wise to use this battery technology, which is dependent on a solid-state BMS to avoid destruction, in a system that will eventually take a lightning hit? To me, these batteries are an excellent way to burn my house down. I avoid them both at work and home.

    • DIY Solar Power with Will Prowse
      DIY Solar Power with Will Prowse  8 days ago

      LiFePO4 is non combustible. You need to hit the books buddy, maybe you're not up to date with li-ion chemistries. This is used in medical carts in hospitals with multiple protection features, it's fine. If you would like to present an argument with some part of the schematic, let me know. And going by your experience, it sounds like you have no clue about LiFePO4.

    • DIY Solar Power with Will Prowse
      DIY Solar Power with Will Prowse  8 days ago

      Hahahahhaha is this a joke

  • Top Pay Position
    Top Pay Position 8 days ago

    He's waving his hands around the posts and freaking me out with the lack of safety habits.

    Look at his arm laying over the post and his hands gestures on the grounded surfaces and other posts. INSANE.

  • Jackson Duval
    Jackson Duval 9 days ago

    Great vid bro, just subscribed

  • Schnozistan Czar
    Schnozistan Czar 9 days ago

    Until they explode

  • AG.
    AG. 9 days ago

    Thanks for the useful and informative video, can I connect multiple batteries in parallel to inverter to bump up good supply of current and leave it upto the inverter to manage the voltage and amperage for the concerned device connected to the inverter?

  • Salvy Gonzy
    Salvy Gonzy 9 days ago +1

    $400 is that cheap for you wow your rich

  • Phil Church
    Phil Church 9 days ago

    12v lead acid car batteries are about £50 to 80 new in england where are you getting yours, ?

    • MiG21aholic
      MiG21aholic 9 days ago

      Car batteries are for high current drains and have small capacity. They are not usable for a deep cycle application

  • Magnetic Fishing Madness

    they gone...

  • Chrisnas1
    Chrisnas1 9 days ago

    So is this video for car audio, or for cars?

  • Brian Joyce
    Brian Joyce 9 days ago

    Solar Geek you are newest superhero

  • Jasen Jahn
    Jasen Jahn 9 days ago

    I have a lake cabin with no power. I would like to power a small refrigerator, mobile devices and lights. Where do I start?

  • The1stDukeDroklar
    The1stDukeDroklar 9 days ago

    Seems that if you owned an electric or hybrid vehicle you could access and use its battery bank to increase your capacity in an emergency situation. Preferably without disabling the vehicle.

  • Debbiebabe69
    Debbiebabe69 10 days ago

    Why do you have pb acid batteries as SO expensive? 350-450 USD??? Over here, you can buy them brand new for around £50, which is 60 US dollars....

  • Jack Coleman
    Jack Coleman 10 days ago

    I want some Will !!!!

  • Kellie R
    Kellie R 10 days ago

    Everything you said is a whole different language to me.
    Not sure what the tests were that you ran.
    If you ran a 50 amp RV on them, how long would they last at full charge before needing to be charged again?

    • nessotrin jean
      nessotrin jean 10 days ago

      I would say around 1.5 hours. Not enough details.

  • NoVaKane
    NoVaKane 10 days ago

    No batteries can be very cheap

  • pauldzim
    pauldzim 10 days ago +3

    Hmm. “Dirt cheap” and “lithium battery” are two things that shouldn’t go together

  • Beaste Meauxde
    Beaste Meauxde 11 days ago

    It may charge up but how fast does it go dead?

  • Jamie Stone
    Jamie Stone 11 days ago

    So confused. I just want to run my whole house. Mainly power to portable air conditioners and fridge. Dont have a clue about watts amps etc. I just plug stuff into outlets. Maybe u can do an idiot's guide to beginners who want to survive for months if all power is out. Trying to learn!

  • Jose Figueroa
    Jose Figueroa 11 days ago

    Would you recommend these batteries to replace a automotive 12v battery?

    • Dusan Zec
      Dusan Zec 10 days ago

      It's dangerous in an accident cuz lithium burns like a mother if punctured or burnt. Thats why you don't see em in cars at all just jump starters.

  • mike flynn
    mike flynn 11 days ago

    I've worked in medical engineering, only with lead acid, they were only used as backup in case of mains failures, they were never discharged, but had to be replaced after a set time period, although they we perfect

  • Daniel Ellis
    Daniel Ellis 11 days ago

    Dude thank you. Your the shit. Building a tiny home now

  • N Martin
    N Martin 12 days ago

    Q. For ANYONE who knows what they are talking about: is the 138AH battery on ebay from Trucking industry a good bet?

  • donbanes
    donbanes 12 days ago

    I still can't see paying that much. I can go to almost any auto parts store and pay $120 for new six volt GCI golf cart batteries.