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Open Roads Forum  >  Tech Issues

 > Change to Lithium-ion?

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MEXICOWANDERER

las peñas, michoacan, mexico

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Posted: 06/27/19 03:19pm Link  |  Quote  |  Print  |  Notify Moderator

For novelty hot rod bling that's pretty pricey.

The best way to save thirty pounds is the push-away diet for beer belly hot rodders.

AGM batteries give great CCA but more important is aftermarket gear reduction starter motors use half the amps and greater HP

So unless the battery is used in cycling service it is nothing more than Mr. T grade, gold chains.

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Posted: 06/27/19 03:43pm Link  |  Quote  |  Print  |  Notify Moderator

MEXICOWANDERER wrote:

For novelty hot rod bling that's pretty pricey.
So unless the battery is used in cycling service it is nothing more than Mr. T grade, gold chains.


Love it Mex!!

time2roll

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Posted: 06/27/19 03:53pm Link  |  Quote  |  Print  |  Notify Moderator

I think some like the higher resting voltage too. Or have them configured even higher.


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Itinerant1

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Posted: 06/27/19 04:00pm Link  |  Quote  |  Print  |  Notify Moderator

Airdaile wrote:

In addition to the cost, you really need some kind of battery management system on LiFePOs. The voltage doesn't just trail off like wet cells. I've read RV bloggers that went over to lithiums and they spend a good part of their leisure time tracking exactly how many amp hours they've used so they know when to start charging. Not my idea of fun, so when it came to battery time, I went with the tried and true GC2s.


If those bloggers are spending a "good part" of their leisure time babysitting lfp batteries maybe they need a better charging/coulomb counting device.

steveh27

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Posted: 06/28/19 04:58am Link  |  Quote  |  Print  |  Notify Moderator

I wish I had room for 2 gc batteries, but I do not even have room for one, too high. The one I have on order comes with the BMS. I was thinking of buying Walmart's 135ah agm for $400, but this 200 ah lifepo should give me much more usable ahs.

2oldman

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Posted: 06/28/19 08:50am Link  |  Quote  |  Print  |  Notify Moderator

The link shows 100ah. Op is gone.

valhalla360

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Posted: 06/28/19 09:17am Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm wrote:


What I believe: They do pack more power in a smaller package and it's lighter as well. For the hot rodders every pound you can shed is Well an increase in your power/weight ration and a reduction in the time to the finish line.. Thus good. (The life span is not as important to them as is the prize money).


Not sure if it's against the rules..but if that's the case, just put a tiny motorcycle battery in and use a jumpstart pack to start it.

Same weight savings without the complications...and pretty darn cheap.

Of course, in racing, cost often goes out the window as people try to show off how higher tech you can be.


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RCMAN46

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Posted: 06/28/19 09:56am Link  |  Quote  |  Print  |  Notify Moderator

Here is a typical discharge curve for different loads on a LiFeP04 battery.

I would consider the curves to be very flat from 20 percent to 80 percent capacity.

[image]

steveh27

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Posted: 06/28/19 10:38am Link  |  Quote  |  Print  |  Notify Moderator

2oldman wrote:

The link shows 100ah. Op is gone.


Yes it does, but as my earlier post stated, I contacted them via email and they constructed 2 to meet my batt box size requirements and give 200AH.

MEXICOWANDERER

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Posted: 06/28/19 11:30am Link  |  Quote  |  Print  |  Notify Moderator

There are super-exceptions to many things. Size prohibitions versus demand is a very valid reason. Price to advantages determines the intelligence of spending 300% of the cost of an equivalent AGM.

Wearing a ROLEX OYSTER will not improve nor make an hour more accurate.

Immunity of damage from part refill is valid enough but the saving of perhaps 80 pounds by itself seems week. Especially if there are 800 pounds of hand tools aboard.

Whether colonial or danish modern, the furniture will fit your butt the same. To spend three times the money is a personal choice, little to do with purely practical reasons. Is it justifiable? or is it a target for an excess of practical criticism? An ego bragging point around the office cooler or campfire?

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