Author Topic: Shorai battery testing  (Read 16661 times)

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Offline doug

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Re: Shorai battery testing
« Reply #25 on: January 09, 2011, 09:29:19 pm »
Hold on Necron.. In that Yankee cold, smart a$$ comments take a while to soak in  ;).. However @ 40F, I got it right away!  :))
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Offline Necron99

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Re: Shorai battery testing
« Reply #26 on: January 10, 2011, 09:54:20 pm »
It's ok, i'm not funny to EVERYONE.  LOL

Offline Zorlac

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Re: Shorai battery testing
« Reply #27 on: January 13, 2011, 01:35:45 pm »
"Cold" being what ambient temp?

It was about 38 degrees this morning when I started both bikes, though it later got to about 68 today. They were both totally cold soaked at the time I started them.

I thought you said cold Fred? That sounds more like a cool test!!!  :))   Personally I think it would at least have to be below freezing to get a somewhat true cold test.   >:D
That's coming next week. It's supposed to be around 17 here Wednesday morning.
???? ????
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Offline Rob

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Re: Shorai battery testing
« Reply #28 on: January 13, 2011, 04:43:34 pm »
Make no mistake, this is a lithium ion battery.  The LiFePO4 (Lithium Iron Phosphate) is the active material in the cathode.  This has the same overcharge/discharge concerns as any other lithium ion chemistry, but it is less likely to vent violently due to the composition.  There are no doubt on board control electronics to prevent overcharge/discharge conditions.

Fred, what is the measured voltage fully charged?

Offline Zorlac

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Re: Shorai battery testing
« Reply #29 on: January 15, 2011, 03:00:18 pm »
Fred's thumb is frozen to the start button I guess.  :)
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Offline Fred_Harmon_TX

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Re: Shorai battery testing
« Reply #30 on: January 17, 2011, 03:55:05 pm »
Resting voltage is about 13.3 volts.

The one on the C14 seems to be doing fine on cold starts without any problems.

The one on the Wing struggles a little when really cold, but turning on the headlights and/or heated gear for a couple minutes seems to be enough to wake it up. The first crank on the Wing can be a bit slow, but if I let off the starter and crank it again a second time it cranks faster, and each subsequent crank is faster.
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Offline Zorlac

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Re: Shorai battery testing
« Reply #31 on: January 17, 2011, 05:36:03 pm »
Do you recall the actual ambient temp?
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Offline Fred_Harmon_TX

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Re: Shorai battery testing
« Reply #32 on: January 21, 2011, 02:14:13 am »
Do you recall the actual ambient temp?

The coldest morning temp I've started the Wing in is about 28 degrees, fully cold soaked. I've started the C14 at about 22 degrees.

The only trick is you need to power on the bike and draw some juice off the battery before you hit the starter button. In these temps, its no big deal cause it gives you a chance to power on the heated grips and plug in your Gerbings and get them warm before you start the bike. If you simply do that for about a minute or so, the battery cranks like normal. But if you are impatient and just turn on the key and hit the starter fully cold at 22 degrees, you may notice it cranks a bit slow for the first second or so. Like I said previously, its not really much of an issue on the C14, but on the 6 cylinder Wing, it can make the starter spin slow if you don't wake up the battery first.

I've also noticed that if you crank it for a second or two and then let off the starter before it fires, and then crank it a second time, it cranks faster on the second try. Just drawing current off the battery breaks down the passivation layer on the anode, and then the internal resistance drops, and it can provide full current.
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Offline scrape

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Re: Shorai battery testing
« Reply #33 on: May 01, 2011, 10:54:50 am »
So Fred, it has been a while for this topic, and an update is welcome.  Does Shorai get the thumbs up?  Outside of the weight savings do you think the bang for the buck is a good value?  If one changes their battery every three years anyways (paranoia due to learned lessons over the years),  would you still spring for one of these batteries? 

Offline Fred_Harmon_TX

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Re: Shorai battery testing
« Reply #34 on: May 16, 2011, 01:02:35 pm »
So Fred, it has been a while for this topic, and an update is welcome.  Does Shorai get the thumbs up?  Outside of the weight savings do you think the bang for the buck is a good value?  If one changes their battery every three years anyways (paranoia due to learned lessons over the years),  would you still spring for one of these batteries?

I've only had the battery in since about December, so it's a bit too early for a long term update, but so far it's working great. Shorai is now making some even larger capacity batteries, and I'm getting ready to install one of their new 24 amp/hour batteries in the Wing.

I'll really need to use it for several years before I can tell you anything about the longevity of it, but all indications I have so far are very positive. You'll have to make your own judgement on whether the increase in price is worth the weight savings or not, but given the high price of batteries for the C14, it really isn't all that much more.
Fred H.


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Offline Fred_Harmon_TX

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Re: Shorai battery testing
« Reply #35 on: May 18, 2011, 12:22:49 am »
Shorai sent me one of their newest high capacity (27 amp hour) batteries for the Wing today. It has 405 cold cranking amps, so now I can jump start motor homes with my Wing. It weighs a whopping 4.2 pounds.



Shown here next to their 18 amp hour battery

Fred H.


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Offline Pat and Sher in MA

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Re: Shorai battery testing
« Reply #36 on: May 18, 2011, 12:43:41 am »
Hi Fred,

Looks like they changed the terminals to be like the Odyssey batteries or am I missing
something in the bag-o-parts? Are they changing all the batteries to that style since it
was reported that the old style terminals were pretty weak?

Thanks,
Pat & Sher in Ma.  04 C10 Dark Angel,  87 Ninja 600RX

Offline Fred_Harmon_TX

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Re: Shorai battery testing
« Reply #37 on: May 18, 2011, 12:55:35 am »
Hi Fred,

Looks like they changed the terminals to be like the Odyssey batteries or am I missing
something in the bag-o-parts? Are they changing all the batteries to that style since it
was reported that the old style terminals were pretty weak?

Thanks,


I'm not sure if they have all been changed to this style or not. The terminal bolts onto the top of the round plug and can be oriented a couple different ways.



Fred H.


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Offline Wayne_Sikorski

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Re: Shorai battery testing
« Reply #38 on: May 18, 2011, 01:10:44 am »
The question that just has to be asked...will it fit the C14?  ;D
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Offline Pat and Sher in MA

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Re: Shorai battery testing
« Reply #39 on: May 18, 2011, 01:37:29 pm »
Hi Fred,

Thanks for that updated picture with the terminals attached. I couldn't see those in the
bag of parts in the first picture. Looks like a nicely adjustable set up.

Thank you,
Pat & Sher in Ma.  04 C10 Dark Angel,  87 Ninja 600RX

Offline Fred_Harmon_TX

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Re: Shorai battery testing
« Reply #40 on: May 19, 2011, 08:22:36 pm »
The question that just has to be asked...will it fit the C14?  ;D

No, the 27AH won't fit, but the 18 AH model will, and I have one in my C14 now.
Fred H.


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Offline Mad River Marc

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Re: Shorai battery testing
« Reply #41 on: May 24, 2011, 01:54:16 pm »
I wonder if it has charging circuitry built in,  LIFE is still LIPO/LIION if I'm not mistaken...more resistant to overcharge but still needs a special waveform to charge.

Having been involved in Model aircraft for a while, I've seen first hand what happens when a high amperage Lithium pack is charged wrong (or the charger circuitry fails which while rare can and does happen),  one of the guys at my flying field came close to having  and having witnessed this there is no way I am putting ANY form of lithium battery that large on my bike..

Call me over protective if you'd like but that's how I feel...
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Offline Fred_Harmon_TX

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Re: Shorai battery testing
« Reply #42 on: May 24, 2011, 02:43:59 pm »
LiFE is lithium Iron, and is not subject to the catastrophic failures that lithium ion is.
Fred H.


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