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New Battery: Optima RT 35 vs. 75/25

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3.8K views 3 replies 2 participants last post by  transit  
#1 ·
I notice my old battery is starting to go (came with the car when I purchased it used back in 2010).

I've been looking at Optima Red-Top since this is my DD and I really don't use any electronic in the car besides charging my phone so no need for the Yellow-Top Deep Charge. Also I want the 35 since I always notice a low crank in winter so I want something juicier to handle the Winter and looking at the 35, a CCA of 720 should be plenty for safety reason.

Now the question: I noticed they have product 35 and 75/25. The only difference I could tell is: 35 has a width of 6" 3/4 and 75/25 has a width of 6" 13/16, which is not a lot of different, and the price is pretty similar. So what's the difference? Both has the same CCA and CA of 720/910...

Also another quick question, I noticed my driver auto power window no long does Auto roll-up/down, does that have to do with the battery??

Thanks for all the help! :)
 
J
#2 ·
transit said:
Also another quick question, I noticed my driver auto power window no long does Auto roll-up/down, does that have to do with the battery??

Thanks for all the help! :)
Click to expand...
I wouldnt think so. Mine has been getting tempermental lately and will instead of roll up automatically it will start to and then go back down. Only does it once at a time and then does it very sparingly. Im pretty sure its in the switch though, if its working its getting juice. Might want to look into replacing the switch.
 
#3 ·
Awww damn, I did hear the window squeak when it rolls up and down AKA resistance... But this happened yesterday when the car really wouldn't crank.. It did start up on first crank, but you can see the dashboard light just goes on-off-on-off during cranking. Gonna get checked out at Advanced today after work to see how the battery is doing!
 
#4 ·
Well, I found the answer while talking to the guys at Advanced Auto. 35 is a top mount and 75/25 is a side mount thus it's a bit wider. Also the test came back that my crank amp is <200!! no wonder the car sound like a dying car when starting up...

Also the auto window is back! :)
 
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