hey guys wondering what kind of small battery are you guys running. Im trying not to relocate my battery rather get a good smaller battery perhaps the odyssey battery and still on the stock location. I am willing to trim down the battery tray also to make more room in the engine bay. If anyone have pics of their setup please post them up.

 

I just bought this battery:

http://www.batterymart.com/p-odyssey-pc680-battery.html

They shipped it next day.

I've run this same battery in the past without issues in stock location. This time around I'm gonna sneak it in the rear fender area either in place of the tools or where the antenna motor was.

-M

 

I run the Odyssey 680 in stock location. Never had any problems. Unplug it in December when put away and just pluged it back in with no charging the other day and she fired right up.

 

I was making the same decision not so long ago,

Unless you really need the the extra space I would personally go with the 51r battery instead of the pc680. The 51r is an actual car battery, so you don't have to worry about it discharging if you leave the car sitting for an extended period of time. Don't have to worry about leaving the ignition on for too long, etc. I use to have a pc680 on an old car and always got annoyed having to remember to not do anything that would drain the battery, and also having to redo all the settings on my radio.

Also the 51r is not that much bigger than a pc680, so the amount of space you'll be saving at least to me is pretty negligible.

 

Im sorry what is a 51R? Do you happen to have any pics? Thanks for all the imput guys but still deciding on which one to get.

 

what's the main reason for needing the smaller battery? in all honesty, it has created headaches for just about every owner i have in the shop who has ever had one in their car. i would only run one if you ONLY have limited space which requires it. if you are trying to save weight, be prepared for the consequences of a low cranking reserve utility battery that was never intended for full sized automotive purposes.

 

This is the one I'm going after. It's slightly smaller than the Miata battery but much more powerful. It also has nearly twice the reserve capacity. It should fit nicely in the bins.

http://www.braillebattery.com/index....es/b3121/specs

 

I'm going small cause of space of course. I have the greddy stock mount intercooler but even with that the Ast coolant hose is pretty tight and touching the edge of the stock battery. I dont want relocate the Ast cause the Greddy intercooler has a spot for it that sits ok. Just the battery I want to be just alittle smaller. But I didnt realize even with our rotary would still need that much cranking power to turn it.

 

The amount of space savings of the PC680 is substantial.

It may not seem like much difference at first, but the 680 is much easier to fit into an engine bay if the space is tight.

I can't tell you how many times I've had to show autox and track day tech inspectors where the battery is, though it is in the engine bay, pretty much in plain sight.

The only time it's failed to start the car in 3 years is when the charging system wasn't working properly (oil on the pulleys when the catch can overflowed d'oh!)

 

Yeah... I had a PC680 on my previous FD and never had an (electrical) starting problem. Also ran the same battery on my Evo in the cold Michigan winters and never had issues.

I would have however liked to give the Braille a shot. It was on my short list.

-M

 

The 51r is basically a miata battery. You can find them at any local auto parts. Here's a picture of my engine bay with it, I have a blitz fmic:

 

pc680 is good but will not start your car if you leave it sitting for 7 days.

unhooking it is an option, but is a pain for me since it kills all my radio presets and EQ settings.

something to think about. its a bit of a pain if it isn't your daily.

you would need to unplug or put a trickle charger on it..

still, other than not good when hooked up and sitting for long periods.. i still love mine.

 

There is a smaller optima yellow-top that could be used. Optima yellow top is designed for deep cycle & cranking. I'll search around for the PN.

I think this is it: http://shop.optimabatteries.com/prod...51/1737.0.1.1?

 

I've never seen this version before. When you compare this Optoma to the Braile in my above link, the Braile has the better specs (smaller size, less weight, more cca, more reserve).

 

51R is a battery size. Honda Civics and Acura Integra used this size so it is commonly available at most auto parts stores.

See pic

http://rides.webshots.com/photo/1277...34192742KTuPkY

 

I've never really had issues with mine draining out after just a week. I've been using a PC680 for years now (the same battery) and had zero issues with the battery (the alternator failed once, while I was still living in England, but that's a different matter).

 

Come on guys, lithium is where its at... 8 pounds with 900 CCA

http://www.braillebattery.com/index....es/b128l/specs

thewird

 

I've had my pc680 for 6 years now and have not had a problem at all...

 

I haver customers that have had terrible problems with the PC680, however we have been having good luck with it's bigger brother the PC925. I am about to try one of the PC1200 in my car since it just went through it's yearly Optima Yellow top.

 

100% agree with the PC925.

I had a PC680 for a couple of years and would not buy another. At first it was great....if you drive your car everyday or at least once a week. Otherwise you need to keep it on a trickle charger or disconnect the battery every time you park it in the garage. Mine slowly started holding less and less of a charge until finally, it needed to be jumped every time I wanted to start the car.

So I relocated the battery to the back and used a PC925 this time. Also, put a circuit breaker in line next to the battery. Now I just pop the circuit breaker when I park the car (for added security) and am not scared of killing my battery from running it down while parked or while trying to crank a motor that doesn't want to start.

The PC680 weighs 14.something pounds and the PC925 weighs 25 pounds.

 

MSRP $1995.00

 

A lot of bad information in here. If you are having to put you car on the trickle charger with a PC 680 then there's something in your car drawing power when it shouldn't.

I have left mine in all the time with the car sitting for over a week and it would start no problem. It would only need recharging if it was left for over a month without running.

The PC 925 or 51r are about the same and aren't much smaller than stock. This won't give you much room in the engine bay unless you relocate.

 

My once a week comment was more of a generalization than an exact figure. Like I said, it worked for me for a few years, but I only drove my car a few days in a row every few weeks. I never put the car on a trickle charger, but the battery would have lasted a lot longer if I had. So like I said...if you don't drive the car much (i.e. less than once every few weeks), get a trickle charger, pull the battery cable between each time you drive it, or just get a bigger battery than the PC680. Just because you have one experience, doesn't make all others bad information.

And the PC925 is much smaller than stock, and is smaller than a 51r for that matter.

Dimensions (LxWxH) | Weight | Cell Type
Stock (Duralast): 9.0625" x 6.9375" x 8.875" | 38 lbs | Wet Cell
51R (Duralast): 9.375" x 5.0625 x 8.75" | 27.8 lbs | Wet Cell
PC925: 6.46875" x 6.875" x 4.875" | 24 lbs | Dry Cell

Also, the PC925 can be mounted upright making its footprint only 6.875" x 4.875", which isn't much bigger than the PC680's 7.0625" x 3" footprint.

 

I had a PC680 then a PC925, if it's hot out and the fans run after shut down I would sometimes need a boost to start the car. After some time they lost charging capacity.

Now I'm using a Braille and no problems so far.
B3121
21lbs/9.5kg
1380 Pulse Cranking Amps
31 Amp/Hr Reserve
6.6” x 5.2” x 6.8"

 

PC925 is 6.64"L x 7"W x 5"H, this is much smaller than stock 9"L x 7"W x 8'H.

It can also fit in a rear bin without cutting the bottom out of it.



The PC1200 is 7.87"L x 6.66"W x 6.8"H