battery under seat

[ExplicitUrSelf 10+ year member]

i have 01 chevy blazer 4dr.im having voltage problems when i have my music off with my music off im at 14.80v and when i turn on the music my voltage 12.6v.i was thinkin for putting a small batery under the seat if there is some sort of battery thats small.will a motorcycle battery work or will be it a waste of money? i will be doin the big three upgrade soon.what are your opinions/suggestions, forgot to mention i have an optima red top battery under the hood, not sure if there are better batteries out there that will be better than the one i currently have to fixthe problem. the battery i have is bearly a year old purchased at pepboys

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[smoka 10+ year member]

Definitely do the big 3 asap. Then check all your grounds, make sure you sand the paint off to get a good connection. Any resistance in the wiring/connections will cause extra voltage drop.

 

[csu87 10+ year member]

i have a jimmy and i dont know of any batteries that will fit under the seat. not a lot of room down there. why not put them in the back?

 

[lovindabass]

sounds to me like you have an alt problem If your alt is factory putting out 14.8?... thats a little high if nothing else has been done to it... That would explain why it drops so low too. My alt runs 14.8 to 15.1 and i had to get a MLA module ( missing link audio module ) to get that kind of voltage. Go to like autozone and have them check your alt. I don't think that it is a good thing that your voltage is that high without you doing something to it. Generally if its a factory alt and its running that high on its own then its usually your alt about to go!

 

[djarmy2004 10+ year member]

do the big 3 but i dont know of any 12v batts that will fit under the seat. Maybe you could add an extra batt in the back maybe an HC1200 they run less than 200 on ebay.

 

[blazeplacid 10+ year member]

if you are gonna do a battery in the car make sure its a sealed, you dont want it to vent out over night and you get in smelling all nasty

 

[ExplicitUrSelf 10+ year member]

There is no resistance on my cables, my grounds are fine i recently fixed that problom. I dont want to sacrifice anymore since i have a 18h, 18D, 25W box in the trunk. Maybe it is my alt that is going out. Thanks for the responses.

 

[ExplicitUrSelf 10+ year member]

I called my local auto parts and they told me that the oem alternator has 100 amps...If my alternator is bad i am planning to go with a bit higher than 100 amps. Would that be safe for my car or what are the pros and cons besides the price