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      12-19-2015, 02:30 PM   #1
nholmes
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Question What lightweight battery are you using?

Looking at options to save weight as I've read the OEM battery in the E92M weighs 60lbs?

What are you running?
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      12-19-2015, 03:10 PM   #2
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I still use the stock battery, but I stoped eating at Wendy's.
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      12-19-2015, 06:51 PM   #3
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Quote:
Originally Posted by TomHudson View Post
I still use the stock battery, but I stoped eating at Wendy's.


I'm looking to shave weight everywhere I can, including the waistline.
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      12-19-2015, 08:26 PM   #4
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Search ortho281. He put in a BMW one that was 40 lbs and could be registered. Cut 20lbs.
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      12-19-2015, 08:30 PM   #5
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Can you get lithium ion? They have them 4 the merc.
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      12-19-2015, 08:40 PM   #6
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I am using the VPR S30C from Volphreaks. Weighs 7.5 lbs and has been fantastic over the last 5 months. No issues with registration and electronics, etc.

And yes, the stock battery weighs almost 60 lbs.
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      12-19-2015, 10:18 PM   #7
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Do you have to keep it on a tender at night? How did do the mounting or did it fit under the existing clamp setup?
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      12-19-2015, 11:13 PM   #8
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Quote:
Originally Posted by surlynkid
Do you have to keep it on a tender at night? How did do the mounting or did it fit under the existing clamp setup?
It doesn't need a tender at all, it has been fine for up to three weeks. I would not hesitate to use as a daily solution. It will shut itself down at a threshold, so as to protect itself, and not go to zero voltage, and can be turned back on using the button on the top of the unit.

I had a custom clamp made to secure it for the track, but used the existing battery connections. It is substantially smaller than the stock unit.
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      12-19-2015, 11:25 PM   #9
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I'm using a braille 17 lb but it's always on trickle charger and car had no radio or other accessories to run.
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      12-20-2015, 02:31 AM   #10
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Quote:
Originally Posted by evilspiritM3 View Post
It doesn't need a tender at all, it has been fine for up to three weeks. I would not hesitate to use as a daily solution. It will shut itself down at a threshold, so as to protect itself, and not go to zero voltage, and can be turned back on using the button on the top of the unit.

I had a custom clamp made to secure it for the track, but used the existing battery connections. It is substantially smaller than the stock unit.
That's an insane weight reduction. No problem with other electronics running in the car?
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      12-20-2015, 12:43 PM   #11
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I've been eyeing Shorai because of the cost, but I like the offerings from FalconEV.

http://www.falconev.com/batteries.html

The website is straight-up 90s, but the guy is legit. Made to order batteries that cost less than those from Braille and Voltphreaks.

The batteries from Shorai might not have enough pulse amps, the OEM battery is around 1300PA.
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      12-20-2015, 12:48 PM   #12
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Quote:
Originally Posted by redpriest View Post
That's an insane weight reduction. No problem with other electronics running in the car?
I really cant speak to that, because my car is stripped of non necessary electronics.

But the battery provides 40 Ah, and 1160 CA which is more than enough in comparison with the stock battery.
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      12-20-2015, 12:55 PM   #13
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Quote:
Originally Posted by evilspiritM3 View Post
But the battery provides 40 Ah, and 1160 CA which is more than enough in comparison with the stock battery.
Do you know the OEM pulse/crank amps? My google-fu showed 1300, but I'm not completely confident that data is accurate.
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      12-22-2015, 02:44 PM   #14
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Correction, OEM is 850CA 92Ah.
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      12-22-2015, 03:15 PM   #15
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Mini cooper battery as well.
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      12-22-2015, 04:00 PM   #16
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I'm using a Voltphreaks VPH900, weights around 7lbs, is registered and I have shed 53lbs from the ass

Have had zero issues and would highly recommend it...if you have the Benjamins to drop on it though, ain't cheap

I used to dd the car with the battery and no issues
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      12-22-2015, 04:03 PM   #17
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Am using the phone app which is weird and won't me me edit post for pic

Here:
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      12-22-2015, 04:04 PM   #18
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Quote:
Originally Posted by italyix View Post
Voltphreaks VPH900
That's a nice battery, but $1100?



Anyone have any experience with Shorai in our platform?
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      12-22-2015, 04:09 PM   #19
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Quote:
Originally Posted by m3SennA View Post
using the mini cooper battery. weights about 30lbs.
no problem at all.
MINI or Z4M batteries are good low-weight replacements and bolt into the factory location, we use the Z4M version. Vehicle will need to be registered/coded for the new Ah rating.
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      12-22-2015, 04:26 PM   #20
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Quote:
Originally Posted by tom @ eas View Post
MINI or Z4M batteries are good low-weight replacements and bolt into the factory location, we use the Z4M version. Vehicle will need to be registered/coded for the new Ah rating.
How does the Z4M battery hold up compared to our OEM under load in colder Climates as a daily driver: A/C, rear defroster, wipers and heated seats in stop and go traffic?
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      12-22-2015, 04:32 PM   #21
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Quote:
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How does the Z4M battery hold up compared to our OEM under load in colder Climates as a daily driver: A/C, rear defroster, wipers and heated seats in stop and go traffic?
Perfectly fine in SoCal. Should be fine in most areas but may be a bit of a challenge in colder climates if not driven on a regular basis.
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      12-22-2015, 04:43 PM   #22
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i ran a braille battery for a while but it failed. I got another and it also failed. I have been running a mini cooper battery and it has been good. I have friends with Voltfreaks and they have had no issues daily driving them.
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