Introducing super-lightweight 4-lb car battery!

Announcing a super-lightweight starter battery to replace your
lead-acid battery! Our battery weighs in at under 5 pounds! The stock BMW M3
battery is 48 pounds. The PC680 (most common super-lightweight lead-acid
battery) weighs in at around 14 pounds, plus another pound for the
terminals!

We are a new sponsor on e46fanatics.com, and to jumpstart sales on this
forum, we are offering 25% off for the next month (until 7-24-07).

So you are probably wondering if this battery is safe? Does it work? We
have used the normal version of the battery in several cars, moving it
around from car to car, for 1 to 2 weeks at a time in each car without
any issues! We've used it on an older Chevy V8 S-10 truck, a BMW M3, a
Lexus RX400 hybrid, a modified Civic with an Integra engine, a Scion
TC, and a Acura TL without any issues! We offer a full money back refund
policy for ANY reason within 30 days, and a 1 year warranty. Check out
http://en.wikipedia.org/wiki/Lithium...sphate_battery for more information on LiFePO4 technology, which is what our batteries
are based on for questions on safety issues.

The one disadvantage of this technology is cost. Something to keep in
mind is that useful lifetime of the battery should be up to 10 years, at
least double lead-acid's! Most lead-acid's need replacing every 3
years.

Here's pictures of the install into a BMW M3, where it currently
resides. We've saved almost 45 pounds from this BMW M3! Notice the lack of a
spare tire in the M3, there's run-flat tires and an air compressor
instead, to save weight.



This is the battery we are replacing! Notice how much smaller it's
going to be.



A size comparison versus the stock M3 battery. The battery in front is
from the Scion xA, and was hooked up so that we wouldn't lose our
settings from the car.



Installed battery. We needed to use a one foot extension cable because
the stock positive clamp on the M3 wasn't flexible enough to reach the
positive terminal of the battery.

https://s.p10.hostingprod.com/@www.v...products_id=33

how does this compare to the odyssey batteries?

Originally Posted by Jeuprx-8

how does this compare to the odyssey batteries?

Short answer, they are about equivalent performance wise. Weight-wise, the Odyssey is much heavier. Cost wise, the Odyssey is much cheaper, though life-wise, the Voltphreaks battery will last 2 to 3 times as long. Robustness-wise, the Voltphreaks battery is much more robust.

Long answer:

I'm guessing you're refering to the PC680? I'd say performance-wise, it's pretty equivalent. Even though the Voltphreaks battery is 12Ah compared to the PC680's 17Ah, that 17Ah rating is the 20hr rating. If you compare the reserve capacity, you will see that the Voltphreaks battery can last longer when drawing 25 amps, which more closely simulates the situation of leaving your lights and radio on with the engine off.

That's because these batteries are very "stiff", and can retain their voltage even under heavy load! With a normal lead-acid, on high current peaks (like a big bass hit), you will get voltage sag (lights slightly dim, etc). All this doesn't matter for most people since they don't play their music with their engine off.

So basically, for normal usage, it's performance is the same. Compared to the PC680, the Voltphreaks battery saves you an additional 10 pounds, for about 3 times the cost. The Voltphreaks battery will last twice to three times as long as a lead-acid, though, something to keep in mind! You may never need to replace the Voltphreaks battery for the life of your car, if you take care of the battery (no deep discharges, though deep discharges are fine, unlike most lead-acids, which are destroyed if you bring the voltage below 1.75V per cell).
- Tony

oh wow so the fabrication of a bracket to hold this battery in place is not needed?

whats the shipping on these suckers?

Not knocking the product in any way, but running it "weeks" at a time and giving Wikipedia as an information source does not do well for promoting a product. Again, this may be the perfect product, but you gotta do better than that to sell these things

^ wait why? I'm not disagreeing with you or anything, I'm just wondering how that shows they're...incompetant?

^ I agree with lon, its a possible viable free information source at the moment cause if he were to link it up with other published private owned websites it may cause problems. So if anything its a smart move on their end.

Originally Posted by bmwstephen

^ I agree with lon, its a possible viable free information source at the moment cause if he were to link it up with other published private owned websites it may cause problems. So if anything its a smart move on their end.

It's convenient, yes, but not 100% credible. I'm sure there are other sources out there about the technology that are credible, non-biased public information. I'm not saying the information presented is wrong, but as someone who knows nothing about the technology, I don't think it's smart to present information that is possibly false and easily manipulated.

Originally Posted by Owtlaw333

It's convenient, yes, but not 100% credible. I'm sure there are other sources out there about the technology that are credible, non-biased public information. I'm not saying the information presented is wrong, but as someone who knows nothing about the technology, I don't think it's smart to present information that is possibly false and easily manipulated.

Thanks for voicing your concern! Yes wikipedia isn't the end all authoritative source, but for the most part they try to be as non-biased as possible. But I agree that manipulation is possible on wikipedia. As for other sources of information, I've found some links below.

The cycle life of a lead-acid cell is around 3 to 500 deep cycles:

http://www.enersysreservepower.com/d...M-001_0406.pdf

The Voltphreaks battery can last up to thousand's of deep cycles and still be usable, though with reduced capacity. It's much more tolerant of abuse than a lead-acid, here is a cranking test using the same technology battery, and a link to an article on the cycle-life of nanophosphate LiFePO4 cells:



http://www.greencarcongress.com/2007...stems_int.html

We are using this same technology in our Scion xA electric vehicle conversion, you can check it out here:

http://evconvert.blogspot.com

- Tony

man...if this was like $150 (or whatever price of regular batteries), I'd buy it


orrrrr I'll pay full price $300+ ifffffff VoltPhreaks will offer me a 5-year warranty (seems fair to me, as they claim this technology is supposed to allow their batteries to last up to 10 years, etc. ; and 5 = half of their life expectancy! I'm just not very happy seeing how they're only offering 1 year warranties )

^ lol, Lon im tempted on skipping out on the whole getting a Navigator for our cars just for this deal

Originally Posted by bmwstephen

^ lol, Lon im tempted on skipping out on the whole getting a Navigator for our cars just for this deal

at the moment, I'd rather get the TomTom One XL better bang for the buck...

cuz I'm still under warranty anyway...sooo I could have the stealersh!ts replace my OEM battery for free if it fails anytime soon
in which case, I MIGHT/MIGHT NOT go with this 4 lb. one...it's so expensive for a battery with only 1-year warranty u know? =/
I'd get it from them if they offer me a guarantee of 5-years AT LEAST =D

Originally Posted by mfanatic325

man...if this was like $150 (or whatever price of regular batteries), I'd buy it


orrrrr I'll pay full price $300+ ifffffff VoltPhreaks will offer me a 5-year warranty (seems fair to me, as they claim this technology is supposed to allow their batteries to last up to 10 years, etc. ; and 5 = half of their life expectancy! I'm just not very happy seeing how they're only offering 1 year warranties )

Well, 5 years is do-able, but the risk is someone breaking the battery for example by connecting, for a minute, a screwdriver across the terminals (this would melt the screwdriver from all the current going through it! This would destroy any lead-acid battery too).

I'll see if a 5 year warranty is do-able. I think it should be possible to do as long as there's no burns or marks (or melted metal ) on the battery.

As for the user who asked about shipping, it should be around $12 or so.

- Tony

DO IT!!!
if you offer AT LEAST a 5-year warranty, I'm sure you'll get a lot of sales
cuz honestly, it sounds like a great product...u guys just need to stand behind it ^_^ a lot of people on this forum just want reassurance when they invest in mods, etc.
lemme know if you want a "tester" >=D, I'll buy your product at cost and install/test

How are these batteries for cold weather starts? I've been able to get my OEM battery to crank in all sorts of weather so are these comparable? I'm looking at about -30C/~-25F starts a couple of weeks during the year...

Originally Posted by bmwsk

How are these batteries for cold weather starts? I've been able to get my OEM battery to crank in all sorts of weather so are these comparable? I'm looking at about -30C/~-25F starts a couple of weeks during the year...

The lowest temperature the battery is rated for is -30C, so that will be fine. If it gets colder than that, performance may be degraded but you will still be able to start, it will just take more than one crank (each time you crank, it heats up the batteries a bit).
- Tony

Originally Posted by Aaron@voltphreaks.com

Announcing a super-lightweight starter battery to replace your
lead-acid battery! Our battery weighs in at under 5 pounds! The stock BMW M3
battery is 48 pounds. The PC680 (most common super-lightweight lead-acid
battery) weighs in at around 14 pounds, plus another pound for the
terminals!

We are a new sponsor on e46fanatics.com, and to jumpstart sales on this
forum, we are offering 25% off for the next month (until 7-24-07).

So you are probably wondering if this battery is safe? Does it work? We
have used the normal version of the battery in several cars, moving it
around from car to car, for 1 to 2 weeks at a time in each car without
any issues! We've used it on an older Chevy V8 S-10 truck, a BMW M3, a
Lexus RX400 hybrid, a modified Civic with an Integra engine, a Scion
TC, and a Acura TL without any issues! We offer a full money back refund
policy for ANY reason within 30 days, and a 1 year warranty. Check out
http://en.wikipedia.org/wiki/Lithium...sphate_battery for more information on LiFePO4 technology, which is what our batteries
are based on for questions on safety issues.

The one disadvantage of this technology is cost. Something to keep in
mind is that useful lifetime of the battery should be up to 10 years, at
least double lead-acid's! Most lead-acid's need replacing every 3
years.

Here's pictures of the install into a BMW M3, where it currently
resides. We've saved almost 45 pounds from this BMW M3! Notice the lack of a
spare tire in the M3, there's run-flat tires and an air compressor
instead, to save weight.



This is the battery we are replacing! Notice how much smaller it's
going to be.



A size comparison versus the stock M3 battery. The battery in front is
from the Scion xA, and was hooked up so that we wouldn't lose our
settings from the car.



Installed battery. We needed to use a one foot extension cable because
the stock positive clamp on the M3 wasn't flexible enough to reach the
positive terminal of the battery.

off topic, but nice watch.

i love mine

^ you love your watch, or your 4-lb lightweight battery?