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Whats the go-to for lightweight batteries these days?


mindspin311
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Just bought a Battery Tender LiFePo to replace another older LiFePo I killed.  No complaints yet.  Neat little BMS that cuts the battery off before voltage gets too low (what kills LiFePo batteries especially) so we'll see how long it lasts.  <$200 for the 300cca version (easily turns over our 3.0L).  Its weighs almost nothing.

Edited by Bremsen
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Odyssey Batteries have gotten worst over the years. Their PC680 just doesn't seem to last as long as they use to. Braille is good, if you want to spend some money their lithium G20 is a beast. Or on the lower end Deka's ETX20 or ETX30 are great for their price.

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4 hours ago, Bremsen said:

Just bought a Battery Tender LiFePo to replace another older LiFePo I killed.  No complaints yet.  Neat little BMS that cuts the battery off before voltage gets too low (what kills LiFePo batteries especially) so we'll see how long it lasts.  <$200 for the 300cca version (easily turns over our 3.0L).  Its weighs almost nothing.

How did you attach your cables to it?  

 

Thanks!

 

Rob R.

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29 minutes ago, wvumtnbkr said:

How did you attach your cables to it?  

 

Thanks!

 

Rob R.

With Bolts.

 

Takes normal 1/4-20 square nuts on the posts.  Comes with the hardware and everything

Edited by Huggy
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6 hours ago, Bremsen said:

Just bought a Battery Tender LiFePo to replace another older LiFePo I killed.  No complaints yet.  Neat little BMS that cuts the battery off before voltage gets too low (what kills LiFePo batteries especially) so we'll see how long it lasts.  <$200 for the 300cca version (easily turns over our 3.0L).  Its weighs almost nothing.

This guy?

 

http://products.batterytender.com/Batteries/Smart-BMS-Lithium-Battery-12V-5.0AH-300CCA

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I'm using this in the E46.  Not super cheap, but it's been pretty reliable so far.  We had an ignition short and I cranked the car for ~5 minutes before completely killing the battery.  That seems reasonable to me.  If you lose the alternator, you don't have much time, so be sure to monitor voltage (or better yet, current).  Note that you have to use the manufacturer's charger if you kill it because it has safety cutoff (you'll read 0V if you kill it and can't charge it through the posts).  

https://www.amazon.com/gp/product/B00I69WDUW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

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19 hours ago, mindspin311 said:

 

yup.  Check amazon though, I think its about few $$ cheaper (I paid full retail).  Mine came with a harness/reset button and hardware.

 

21 hours ago, wvumtnbkr said:

How did you attach your cables to it?  

 

Thanks!

 

Rob R.

 

Yeah, mine came with the harness to charge/reset it as well as the terminal hardware.  Might try calling them, maybe they'll send some to you FOC.

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49 minutes ago, theblue said:

are you guys at all worried about fires with batteries like these in your cars?

Considering it is used in all the top forms of motorsports for over 10 years... no. But Braille has been proven time and time again (F1, Indy, IMSA, WEC, Australian V8 Supercar) But I would not use a Chinese lithium battery either.

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So we watched a lithium in Spartans BMW start fire and torched the inside of the car? Has something changed to make them better and safe? 

 

I think it was being over charged by the alternator or something to that effect, seeing that happen we have chosen to stay away and run normal lead acid stuff.

 

Maybe the new "smart" changes the issue.

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28 minutes ago, 55mini said:

So we watched a lithium in Spartans BMW start fire and torched the inside of the car? Has something changed to make them better and safe? 

 

I think it was being over charged by the alternator or something to that effect, seeing that happen we have chosen to stay away and run normal lead acid stuff.

 

Maybe the new "smart" changes the issue.

When did this happen? I don’t remember reading about it. 

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We all walk around with lithium batteries all day every day.  And LiFePos are much more stable than whats in your iphone or laptop.  Overcharging (high volts) and puncture are the two main concerns with LiFePo batteries or any batteries for that matter.  Get a proper charger and make sure its secure and protected in an accident.

 

It negates some of my weight savings, but this is my battery box:

https://www.sportsmansguide.com/product/index/us-military-surplus-waterproof-m2a1-50-caliber-ammo-can-used?a=1586610

 

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Whoa whoa whoa....

 

 

I won't run anything except a lifepo4 battery.  Really stable and doesn't have the same fears as regular lithium batteries.

 

I would not run any lithium battery except lifepo4.

 

Totally different.  No real difference in danger than a lead acid (which also don't like punctures or overcharging)

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