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I am using the Braille GU1R.......Starts the V6 with no issues from both cold and hot. The bracket I have had mad is under 200g, so the battery 'package' is just under 3.2kgs. The Standard batter

Whatever you're into, Imran.

Just finished the bracket for my Braille GU1R. It weighs 380gr. Compaired to the original bracket that weighs 1350gr.  I think that is a nice saving.   

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88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport

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the very same battery offered by Komo-Tec is available directly from Braille, in the UK, here : 

http://www.braillebattery.co.uk/index.php/braille/product_batteries/gu1r

you still have to make a bracket though, or maybe the bracket from Braille (£78) can be adapted ...

HTH

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13 hours ago, The Pits said:

I'd be interested in one too. It's a job to find one that's man enough for the V6.

The Lipo batteries tend to have way better cranking current that lead acids.  I use pretty much the smallest Super B and its way better than any other battery I've used for winging the engine over.  What is hard is comparing data sheets and getting something like for like as the way the specs are written on Lipo batteries is very different.  If I get a spare ten minutes I'll whip the battery of my race car and try it on the V6 here and see if it does the job.

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it seems that a specific charger has to be used : 

Braille lithium batteries are 100% compatible with standard charging systems. The only reason that our lithium charger is required (when charging externally) is due to several reasons, most due to the inadequacy of lead battery chargers. Lead chargers typically put out a voltage in the low-mid 13 volt range at a pulse rate (cannot take constant current or they will cook a lead battery). Lithium chargers put out 14.4 volts at a constant rate, as they charge 5 times faster than lead. Additionally, a lead charger (if used on a lithium battery, which is NOT recommended) would only charge it to roughly 50-60% state of charge and some have a desulfation mode to knock the crud off of the lead plates, which can potentially damage lithium since it doesn’t have any lead in it. A lithium charger put out roughly the same voltage as most alternators and anything at 14 volts will keep the battery at 98% state of charge. 

Many lower end lithium battery require special chargers or electronics to balance cells depending on quality, cell type, cell chemistry, etc.. This is a condition that does not exist with Braille lithium, as the construction and cell type/quality does not need any sort of external balancing and does that itself. 

An overcharging situation would be where a charger or alternator failed and the output voltage exceeded the tolerance of the battery. Braille lithium can handle up to 14.8 volts sustained and would take a long charge of 16 volts are higher to cause damage to the battery. So, if the charging system is putting out 14 -14.5 volts the battery will be happy running like that for a decade or longer!"

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  • 6 months later...
On 11/24/2015 at 09:02, Randy said:

The Lipo batteries tend to have way better cranking current that lead acids.  I use pretty much the smallest Super B and its way better than any other battery I've used for winging the engine over.  What is hard is comparing data sheets and getting something like for like as the way the specs are written on Lipo batteries is very different.  If I get a spare ten minutes I'll whip the battery of my race car and try it on the V6 here and see if it does the job.

@Randy did you ever manage to test this? Assuming it worked can you confirm the battery spec and what you use as a tickle charger? Thanks in advance.

www.alias23.com

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  • 3 months later...

You could look at Odyssey - depends on the size/power you want/need but could be well under 15Kg

http://www.mdsbattery.co.uk/departments/department003.asp?DepartmentID=248&DepartmentName2=Odyssey+Extreme+Racing+Batteries

 

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I think its a different one ... I had it out recently ... I guess maybe 7-8 kg ... if you google the weight savings on the CR vs the S one of the main drivers Lotus mentions is a lightweight battery ... whatever that means ...

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50 minutes ago, 550superfast said:

Wow, so looking at a 14-15KG weigh saving? Will you be able to supply new Braille battery and bracket Dave?

Cannot answer that on here sorry, not an advertiser.... All the posts I make are the things I have learnt or am doing on my own car and im just trying to help like minded souls......:blush:

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We are busy enough to take on more advertisers :)

88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport

Evora NA

For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. 

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