Install the app
How to install the app on iOS

Follow along with the video below to see how to install our site as a web app on your home screen.

Note: This feature may not be available in some browsers.

  • Don't miss out on all the fun! Register on our forums to post and have added features! Membership levels include a FREE membership tier.

Best Battery

Full disclosure. I work for Speedcell.

We make lightweight lithium batteries for motorsports and the military. Let me say that again, we MANUFACTURE batteries. We are not a reseller of Chinese made products. We build batteries in our lab in Las Cruces, New Mexico. We create battery solutions for different applications everyday. We have built systems from 6v to 240v.

If you are looking for a lighter alternative to the YTX20 lead acid battery, we make a battery and subharness for the Pro.

Lithium is lighter than lead acid, but there are some considerations and protocols to follow when using lithium in cold weather environments. Lithium is more expensive than lead acid. I have been running the same Speedcell battery in one of my Pros since 2010.


If you are looking to stay with a lead acid battery, I recommend Yuasa. Not the cheapest lead acid but-- my opinion-- the best. I have no affiliation with Yuasa...

If you have any questions regarding Speedcell, feel free to ask here or PM me.

Murph
 
Last edited:
Lithium is lighter than lead acid, but there are some considerations and protocols to follow when using lithium in cold weather environments. Lithium is more expensive than lead acid. I have been running the same Speedcell battery in one of my Pros since 2010.

Murph

Could you give those details here?
 
Could you give those details here?

Speedcell 7.5Ah (formerly 6.9Ah)= 985 grams or 2lbs 3 oz

Lithium, like lead acid, has performance degradation at low temperatures. The ability of lithium to flow electrons (what is actually doing the work) at low temps is severely reduced. Lead acid also suffers from cold weather performance degradation-- that is why the sleds are fitted with 20 Ah batteries.

Lithium does have quick recovery rates-- one of the reasons I used to recommend "bumping" the starter switch a few times to "pre-heat" (electrically not physically) the battery to essentially wake up the battery so it could deliver the required amps at start up. I DO NOT RECOMMEND THIS METHOD ANYMORE. The mode of failure when there are insufficient amps to power the starter is when the Bendix fails to throw the pinion gear all the way out to engage the gear behind the clutch. This results in premature failure of the pinion gear. There are two methods for cold morning starts.
1.) tried and true pulling of the cord.
2.) we can build your subharness with a flying lead that terminates in an Anderson dual pole connector. We can supply you with a small dual pole Anderson connector that you attach to a jumper (lead acid) battery for your first start of the day.

Another thing to be aware of with lithium batteries is not to allow them to over discharge. If you drain a lithium battery below 10.5 volts static (you left your GPS on or afr gauges, etc) and draw the battery below 10.5 volts-- you now have an expensive paperweight.

The three advantages of lead acid over lithium are
1. cost
2. cold weather performance (at the expense of weight)
3. ability to withstand over discharge (but this will also lead to accelerated failure in lead acid)

Lithium main advantages
1. Significantly smaller size (especially important in turbo applications)
2. Significantly lighter ( typically in excess of ten pounds-- short of having a pull start only sled, where else can you shave off ten pounds for less than $400?)

image.jpg
 
Premium Features



Back
Top