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Thread: Lead Crystal deep cycle batteries

  1. #1
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    Lead Crystal deep cycle batteries

    MY08 TDV6 SE D3- permagrin ooh yeah
    2004 Jayco Freedom tin tent
    1998 Triumph Daytona T595
    1974 VW Kombi bus
    1958 Holden FC special sedan

  2. #2
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    Hi Loanragie, and yes they are a game changer.

    I bought a number of them at the beginning of the year for testing and I am very impressed.

    One of their biggest advantages is that they can be left in any state of charge indefinitely and with no detrimental effect on the battery.

    They are actually delivered with a sticker on them indicating when the battery was last charged, and some of the batteries I bought were last charged nearly 12 months earlier.

    This one feature alone makes Lead Crystal batteries ideal for RV use, particularly for use as house batteries in caravans and camper trailers, that are left unused for long periods of time, between trips.

    They are also “UNDER-RATED”, meaning they are actually rated at a lower Ah than they can provide.

    Lead Acid deep cycle batteries have their Ah rated by testing at C20 loads, where as a Lead Crystal battery's marked Ah is rated using C10 loads. When tested using C20 loads, they are much better than equivalent lead acid batteries.

    Another big advantage is that they can be CONTINUALLY discharge to 0% SoC ( 10.5v ) many hundreds of times.

    I have been cycling a number of these batteries down to 0% SoC and then charging them with different recharge voltages and they can be easily fully recharged with voltages as low as 13.6v. I have not bothered charging them with lower voltages as yet.

    Here are some examples of Ah ratings.

    6-CNFJ-100, their standard capacity 100Ah ( C10 rate ) battery has a C20 rating of 110Ah.
    Recommended Retail price of $550

    6-EVFJ-100, their HIGH capacity 100Ah ( C3 rate ) battery has a C20 rating of 124Ah.
    Recommended Retail price of $695.

    While these batteries can be used in many Land Rover applications, I now have a 65Ah Lead Crystal battery in my L322 RR, but there is no suitable sizes for under bonnet use in a D3 or D4.

    BTW, I will soon be selling these batteries.

  3. #3
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    looks good

  4. #4
    DiscoMick Guest
    This paper is an interesting comparison, although I'm not sure I understand it all.

    http://uksim.info/uksim2015/data/8713a444.pdf

  5. #5
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    I knew a guy in Perth, converting lead batteries to lead crystal, about 35 years ago...

    He was not allowed to install them in cars or convert a battery to be used in a car..

    Of course the end result was, he was put out of business...

    Its about time someone is doing this commercial, some too lazy to do my own, can now buy them...

  6. #6
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    Some interesting back and forth discussion in the solar power arena

    Lead Crystal batteries? — northernarizona-windandsun

  7. #7
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    Hopefully over time the prices will slowly reduce to a level more affordable to the average person......

    Any idea as to how long these batteries will last when used in an Automotive situation as the Main &/or Aux ??

  8. #8
    DiscoMick Guest
    I see one of those posts suggests 1500 cycles, but I'm not sure if that is the same application.
    I like the idea of the electrolyte crystallising, so spills are less possible. Lower weight is a plus in mobile operations.
    Also good is the idea of the battery being able to recover from being deeply discharged to a level which would damage other batteries. This could be helpful for example during extended camping in overcast weather when a fridge pulls the voltage right down. It should then recover with solar.
    Price is an issue course but mass production should fix that.
    It's good to see new battery technologies coming through.

  9. #9
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    Quote Originally Posted by DiscoMick View Post
    I see one of those posts suggests 1500 cycles, but I'm not sure if that is the same application.
    I like the idea of the electrolyte crystallising, so spills are less possible. Lower weight is a plus in mobile operations.
    Also good is the idea of the battery being able to recover from being deeply discharged to a level which would damage other batteries. This could be helpful for example during extended camping in overcast weather when a fridge pulls the voltage right down. It should then recover with solar.
    Price is an issue course but mass production should fix that.
    It's good to see new battery technologies coming through.
    Mick, This may interest you... When I read through some information on these(and peoples comments), I came across this about cycling the batteries...

    The guy compared a standard lead acid and a lead crystal battery...

    Watch the video, its pretty good looking at the results and having an understanding of the failings of standard batteries, the lead crystal does perform well...

    T4D #44 - Lead Crystal vs Lead Acid battery, final results. - YouTube

  10. #10
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    Hi Wrathe and sorry mate but that guy had no idea what he was talking about or what he can safely do with a conventional AGM.


    First off he states that you should never discharge a battery below 50%, but many deep cycle battery manufacturers specifically state that their batteries, AGM or Wet Cell, can be SAFELY discharged down to 20% SoC.


    Next, most lead acid battery should never be cycled below 20% SoC or 11.56v. Cycling them to 0% SoC or 10.5v will dramatically shorten the life span of most lead acid batteries.


    AGMs were never designed to be discharged down to 0V and taking any lead acid battery to 0v is the quickest way to destroy them and to be completely candid, I am very surprised that he got as many cycles from that AGM before it was destroyed.


    As for cycling the LEAD CRYSTAL battery down to 0v, well why would you need to do so. Nearly all 12v appliances and devices are rated to operate at no lower than 10.5v, the level of a flat lead acid battery.


    Furthermore, I have been testing some lead crystal batteries for around 6 months now and I have been cycling them from fully charged to 0% SoC or 10.5v and I am getting far better results then he is.

    So keeping the minimum discharge voltage to no lower than 10.5v appeared to be far better for lead crystal batteries than discharging them to 0V.

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