Odyssey pc680 is pretty popular and several companies make brackets for it.


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There are recommendations and battery measurements here.

http://www.lotustalk.com/forums/f170/aaarrrgggghhhhh-dead-battery-154849/

http://www.lotustalk.com/forums/f170/evora-battery-replacement-question-124997/

http://www.lotustalk.com/forums/f170/battery-dead-replacement-suggestions-170465/

http://www.lotustalk.com/forums/f170/2011-evora-battery-upgrade-296497/

 

Sounds like you should define your budget as you mention AGM.

I've run Deka/Big Crank AGM batteries in the past. Same battery as Braille and other brands that are all made by EastPenn.

If you want to save significant weight and you demand the utmost support and service after the sale I'd recommend Shorai. They replaced my Ninja battery (that was out of warranty) for free with a more expensive battery (that was sized correctly for my application). I didn't ask for a replacement, they offered it.

San

 

I've had a Deka (BT20X??) for several years now. It's on a Battery Tender most of the time if the car sits for more than a couple of days. It has not caused any problems whatsoever. Wherever you install it, you will need a battery hold down that will fit as the stock hold down will not work. I think I bought a Really Light Stuff hold down for the trunk but then eventually moved it into the engine bay with a BOE mount used with their clam hinge.

I hope this helps

Jeff B

 

ETX20L

San

 

I've run a deka (largest cca and ah I could find cant remember the model and not at home right now) for 3 years. No problem but I tend mine every night. I get about 5 hard cranks before the voltage starts to drop. My ecliptech monitors voltage at startup and it holds 13+ easily. I've been happy. When it goes I'll go shorai but it's a nice cheap alternative, just 2/3 the cca and heavier

 

Thank you for the updates. Big Help !!!

 

I'm looking at a Braille 6 battery. Has anyone used this battery as its only 6 pounds

 

Bosch 91-700B works and fits just like OEM. (Pep-Boys)

Not an AGM, but maintenace free and only 38 lbs.

700cca

 

"Only" 38 pounds? That should be a crime.

San

 

I ran an undersized Braile (B106) and it worked fine (for some definitions of fine that include going dead in 3 days if not disconnected). My under-sizing it required a lot of careful use of the shutoff switch, but it generally started as long as it was charged. Using the recommended size should be just fine. The AGM bit didn't seem to raise any issues, and does avoid sloshing acid. Better than all of that is the much much better brackets available for the various (AGM or lithium) small batteries. Seen a 29lb stocker put a hole in a rear clam when it broke loose from the tiny stock bracket. Such a sad thing.

Of course then I decided 6.9 lbs was 6lbs to heavy for a battery... but that sort of thing is NOT recommended for a street car.

 

Have had Shorai (36 model) for 2+ seasons now and easy to install with all the padding, velcro etc. About the lightest option out there.

 

I've only had mine a year but it has been flawless. I do use the Shorai charger/cell conditioner.

San

 

Interstate. CYTX-20L-BS

 

We are talking Evoras right? I figure since this is an Evora thread............I use an AGM and it has been good for almost 2 years now. I can't remember the brand and it was a tight fit but has been great. Yes it is tied down. I do have battery maintainer as the car sometimes sits for weeks at a time.

 

We are talking Evoras right?

Sorry. My car is an Elise, which does have a smaller engine.

 

Odyssey PC 625 is all you need. Keep on tender. Even nlet me crank my stereo when running and never a problem. That was 2007. In 2016 Shorai gets the nod. Again if not driving for more than 3-4 days, just leave on a tender. I have a small 500mV Deltran Battery Tender for these small units. Like $30 on Ebay. BTW smaller tenders work just fine, they just take longer to top off battery before going into tend mode. Slow charges actually best for batteries anyway from what I've been taught. Cuse the aside.

 

Not just the very small batteries are AGM. There are a lot of full sized replacement batteries that also use AGM technology. The size and technology you choose depends on what your priorities are as far as upkeep vs weight. AGM, in any size, has the advantage of not needing venting if within the car, having no fluids to keep topped up, longevity comparied to traditional lead acid, and shock resistance. AGM batteries can be found at most auto parts stores as well as big retailers like Walmart.

 

What model Shorai are people using in their eliges?

 

Your in an Evora Forum.
LotusTalk - The Lotus Cars Community > Lotus Discussions > Lotus Evora > AGM Battery ?
You might want to ask in the Elige threads.

 

Totally off topic, but the title of this thread throws me off every time I see it lol. Me, being an actual missile man, AGM is the acronym for Advanced Guided Missile (i.e. AGM-65 Maverick, AGM-88 HARM, AGM-114 Hellfire, etc.). I know this won't mean anything to anyone else but me & our resident Apache pilots, but I get a chuckle out of it.

 

Hey Joe, this is what I went with.

I came across this battery at a BatteriesPlus store:

https://www.batteriesplus.com/replac.../48dl/sli48agm

They also had some traditional wet lead acid batteries in Group 91 and 48 also. I was able to swap out the Interstate battery and this one in less than 10 minutes. It is a snug fit with the battery cables but pretty close to the Interstate one. It is also about 44lbs so I definitely did not add 'lightness'.

 

Largest sized Shorai and depending on how you want it installed you pick left or right +. LFX36 series. been flawless for almost 3 yrs now as a track car and a DD. Only time it ever had an issue was first start this spring in the 30's. Needed a little help. Keep on tender if not used more than 4-5 days.

 

I am resurrecting this thread because I would like to explore AGM options, preferably that weigh less then the original Varta battery. The car is sitting for several weeks at a time and I have heard bad things about the Shorai charger if the power goes out, which happens a fair bit where I live. Also, I really like the idea of a sealed battery for my sealed Evora sitting in my sealed garage.

I currently run a Deka EXT-20L in my Elise on a Ctek charger. Current setup on the Evora is an Interstate battery with a Ctek charger.

I am looking at the larger capacity Deka EXT-30L as it gets "close" to the Shorai but I am not sure how this would do if I ever wanted to take a road trip in the Evora. Thanks to @invictusmaneo for sharing his experiences. I am wondering if others had additional Evora AGM experiences to share.

 

I put a Group 48 Duracell Ultra AGM in mine. Probably weighs about the same as a stock SLA/VRLA battery though. No special charger needed, however.

 

what brand number is this battery?
thanks

 

AGM recover from deep discharge better, won't leak acid, and have better vibration resistance. If those items aren't required, save your money and buy a normal lead acid battery.

FYI - I engineered AGM batteries for a year and a half... If there are questions let me know!

 

None of the AGM batteries I had ever recovered nicely from a deep discharge. They are a good compromise I think, and for most a good way to save a decent amount of weight.

San

 

Battery tender is a must with an AGM and a car that isn’t used very frequently. Well honestly that’s with any battery. It’s a convenience thing.

I’ve drained a noname AGM a few times and recharged it. It lasted as long as a rather expensive AGM that had a tender all the time.

I’m convinced they just die after a few years. But they are small, light, and get the job done perfectly in these cars. But seriously get a tender so it’s not dead when you crawl out to the car.

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My Odyssey PC925 is around eight years old and still working fine. I do keep a floating charger connected when the car is not in use. I drive less than 2k miles/year, usually on weekends.

 

@Joe Saganowich - I'm not a fan of AGM batteries for applications where the battery might ever experience an accidental over-discharge. I describe why here.

Glen

 

My history with AGMs in both boats and especially motorcycles, tends to make me gun shy of AGMs as well. They don't seem to bounce back from low voltage conditions. Even if you save them, they seem to return with less capacity. That was distinctly my experience with a 2400AH deep cycle bank of AGMs I installed (at considerable effort and expense) on my boat. Far from the superior performance I expected, they didn't hold up as well as the wet cells previously used in the same deep cycle application.

I thought my experience might have been nothing more than anecdotal, but having read Glen's linked explanation, it makes sense and explains quite a bit that relates to my experiences.