Replacement Battery Options?

Cheezy

Lieutenant
Nov 7, 2016
609
Toledo Ohio
Alright guys I think my battery is on its way out, cranks a little longer than normal so I first though injectors but I checked my battery voltage before start up and it was 11.86v and it should be between 12.25-12.5 if I'm not mistaken. Correct me if I'm wrong. Anyway I'm going to check my plugs to see if they're wet, but in the case they're dry I would like to be prepared with information on what battery's are safe to drop in that aren't oem. Optima? Braille? Deka? Not too concerned about massive weight savings but definitely don't want to be heavier. All answers help and are appreciated! Thanks
 

9krpmrx8

Sergeant
Nov 5, 2016
440
San Antonio, Texas
I run the H8 AGM from Advance Autoparts, higher specs than the stock AGM and it works perfect. And if you use the Advance Autoparts discount code HUGE50 you will get $50.00 off. Or TRT41 for $40.00 off. I registered it using the Carly App.


If you want lighter, I run an odyssey PC925 in my RX-8 and it works well but you will need to keep it on a trickle charger if you don't drive it daily.
 
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Reactions: doublespaces

Cheezy

Lieutenant
Nov 7, 2016
609
Toledo Ohio
I run the H8 AGM from Advance Autoparts, higher specs than the stock AGM and it works perfect. And if you use the Advance Autoparts discount code HUGE50 you will get $50.00 off. Or TRT41 for $40.00 off. I registered it using the Carly App.


If you want lighter, I run an odyssey PC925 in my RX-8 and it works well but you will need to keep it on a trickle charger if you don't drive it daily.
You commented on my thread on n5x haha I'll check the h8 AGM, I think that's more like what Im looking for. Do you think the voltage is indicative of a battery on its way out?
 
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Antbox

Private
Nov 5, 2016
32
Denver
I've heard nothing but good things about braille. Had an optima in my s14. Didn't really think it was worth the price difference. No experience with Odyssey.
 

9krpmrx8

Sergeant
Nov 5, 2016
440
San Antonio, Texas
Optima sucks, I went thru a red top a year before I gave up even though they were being covered under warranty. I also offroad and in the Jeep community the reputation is not so great either. They were sold some time back and they are not as good as they used to be. They just do a ton of marketing.

I have had an Odyssey PC925 in my RX-8 for a few years, it saved about 20lbs and it has worked well. I have an
 

doublespaces

Administrator
Oct 18, 2016
8,886
AZ
Optima sucks, I went thru a red top a year before I gave up even though they were being covered under warranty. I also offroad and in the Jeep community the reputation is not so great either. They were sold some time back and they are not as good as they used to be. They just do a ton of marketing.

I have had an Odyssey PC925 in my RX-8 for a few years, it saved about 20lbs and it has worked well. I have an
Okay, I'll give them a good look. Thanks!
 

Snelson3003

Sergeant
Nov 7, 2016
325
Denver
Got mine from the dealer. I called them and told them that a nearby dealer had a better price(BS) and the parts guy said he would match it. I used an online quote to reference and he didnt ask any questions. LOL
 

Jboyorak

Private
Nov 6, 2016
48
Maine
I'd recommend going with the standard equipment size of 49. You can fit a 47 or a 48 series battery in there. This will reduce weight, but you will be sacrificing both cold cranking amps and reserve capacity(which is the biggest power rating to look for on modern applications, as the modules and other electronics can be power hungry).

My personal recommendations is a 49 series agm battery. They are pricy and heavy(around 59lbs), but are best on any regularly driven car.
 

gorspeed

Specialist
Nov 5, 2016
77
Columbus
What are you looking for in terms of "light" weight? What type of climate do you live in?
I live in OH the midwest, I dont drive the car in the winter however. Really looking for a AGM Battery thats close enough to factory charging profiles. I just dont want to reset the clock if its not on the charger after a day. A couple is fine lol
 

Jboyorak

Private
Nov 6, 2016
48
Maine
47 series agm in weighs around 39lbs and would be a good choice for that.

If it doesn't get below freezing, you could always look into a lithium phosphate battery. Super light, lots of power.
 

Jboyorak

Private
Nov 6, 2016
48
Maine
I run the 49 series agm. While it does weigh 59lbs, it comes with 170 min reserve compacity.

I have no worries about running my heated seats while on lunch without the car running. Or no worries about my battery getting to low when flashing my car. When I go racing, I swap it out with a 3lbs liFEph battery.
 
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