Lead Crystal deep cycle batteries

I was under the impression that he was seeing what it would take to destroy the battery...
As he pointed out, you wouldn't normally do this to a battery...

The idea of intentionally dropping a battery to 0v is the same as throwing it in the paddock and coming back 6 months later and expecting it to start the tractor...

I have killed a few batteries on electric fence units... ie set them up, a couple of months later, move the bulls and totally forget about turning unit off and worst of all, leaving it there til next year and wondering why a perfectly good, brand new battery is good for sinkers only...

Hi again Wrathe, what is the point of destroying a battery, particularly in the case of the AGM, where he was deliberately using the battery outside the manufacturer’s specified operating limits.


Again, the “experiment” was pointless as it actually proved nothing that could be of value in real life use of either battery.

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Originally Posted by workingonit

Some interesting back and forth discussion in the solar power arena

Lead Crystal batteries? — northernarizona-windandsun

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Hi Workingonit, I was sus about the derating of the cycle rates mentioned in the last post in that thread.


This is one of those cases of FAKE NEWS. I spoke to the owner of lead crystal batteries and BettaBatteries, and he informed me that there was no downgrading of any of the cycle rate info for any of their batteries.


Also, be careful of some of the “expert” info posted in that thread. Most of the “experts” are over night experts and have little real knowledge about automotive electrics or how DC circuits work.


An example is the test one the posters carried out, where measured both the voltage and current being draw by a DC/DC device and found that as the supply voltage dropped, the supply current increased, which is correct.


But then through a total lack of any form of real knowledge of how DC circuits actually work, he declares that because the input current draw of a DC/DC device rises as the input voltage drops, ALL DC DEVICES WILL CAUSE THEIR CURRENT DRAW TO INCREASE AS THE VOLTAGE DROPS.


This is the exact the reverse of how almost all other DC devices behave when voltages in a DC circuit drops. As the supply voltage in any DC circuit reduces, so does the current draw of most DC device connected to that supply voltage.


This is the primary reason behind why new vehicles have variable voltage alternator operations. When a motor is under load, like when accelerating, the alternator’s output voltage is reduced, and this voltage reduction will cause the current draw of any devices connect to the vehicle’s 12v system, to reduce.


A reduction of the current load being applied to the alternator means the alternator will require less energy from the motor, which then means the motor will use less fuel, which ultimately means the motor will produce less exhaust emissions.


There are two DC devices that respond in reverse to how most other DC devices react to dropping voltage, and these are 12v to 240vac inverters and 12v to 12v converters ( DC/DC devices ). Both of these types of devices work to maintain a constant voltage and current output and to do so when the input voltage drops, these device have to draw more current to compensate for the dropping voltage.


So while the poster was not intentionally trying to mislead, he still got it totally wrong and it is all to common instances like this that can make “expert” info sourced from the wrong places on the internet more useless than helpful.

I see one of the criticisms of the $46 billion contract awarded to the French to build our next 12 submarines is they chose to go with conventional rather than lithium batteries, which could have saved weight and allowed deeper discharges and longer operating periods. Seems strange.
'Wildly ambitious' submarine plan could mean no fleet for two decades Navy may be without submarine fleet for two decades due to replacement plan, experts say - ABC News (Australian Broadcasting Corporation) - via @abcnews

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Originally Posted by drivesafe

They are also UNRATED, 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.

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Hi drivesafe,

I presume you meant UNDERRATED rather than unrated? That is, they're rated at the C10 rather than the more common C20 Ah rating?

Thanks Ian, that is what it should have been.

I see Lifestyle campers here in Brisbane are fitting lead crystal batteries to their vans. Adds to the cost, but seems a good move.

Yep, a number of caravan manufacturers are switching to Lead Crystal batteries.

Main reason seems to be for longevity!

So Tim, will your Isolators work with Lead Crystal batteries?

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Originally Posted by ~Rich~

So Tim, will your Isolators work with Lead Crystal batteries?

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Hi Rich and "NO".


Lead Crystal batteries can not be charged using any standard isolator, including mine.


They have to be charged with a DC/DC device that has a charge capacity of at least 30% of the battery’s capacity, and one that can charge at around 15.1v, or a Crystal Battery will not charge properly.


So if you are looking at say, a 100Ah Lead Crystal Battery, you need something like a Sterling BB1230 Battery to Battery ( DC/DC ) charger.


The BB1230 chargers are a 30 amp unit with a custom setting that can be programmed to charge Lead Cristal Batteries at their preferred charging voltage.


Failing to charge these batteries correctly dramatically shortens their operating lifespan.


I only sell them now as a complete system, with the batteries and correct AC charger and/or correct Battery to Battery charger.


When set up properly, Lead Crystal batteries are brilliant, but unfortunately, to many people have been given ( and are still being given ) the wrong charging info.