melonhead Posted October 25, 2010 Report Share Posted October 25, 2010 I'm reposting this here since it got no love on the electrical board. I bought an Optima yellowtop for underneath the hood about 4 months ago because my old wet battery died on me. Last night my car died and needed a jump. This is the first time it's happened since the new Optima was put in. The car started right up this morning with no problems. Took my car to Kragen so they could test the battery and it's fine. 13.1 volts and 100% health but only 25% charge rate. I know all about the Optimas and their charge rate but is that what happened here? It got so low that it couldn't even start the car? Am I going to have to charge it every X amount of months? Do I need to charge it now or will it charge on it's own if I just let it sit? Quote Link to comment Share on other sites More sharing options...
getonerd Posted October 25, 2010 Report Share Posted October 25, 2010 well yellow to are not to be used as the main battery but they take forever to charge that why they have red top also just get an charge made for them deep cell batterys Quote 1996 Chevy Tahoe AKA My SQ Hoe Pioneer AVH-X2800BS Precision Power PC.18DS MB Quart NA540.6 Skar Audio RP-2000.1D 55-3210 - 8 Inch MCM AUDIO SELECT Rockville RXM64 Tymphany BC25SC06-04 Kenwood KFC-1795PS Link to comment Share on other sites More sharing options...
bigaltexas Posted October 25, 2010 Report Share Posted October 25, 2010 so red tops dont charge as slow? Quote Link to comment Share on other sites More sharing options...
n8ball2013 Posted October 25, 2010 Report Share Posted October 25, 2010 thats not the issue. they have a slower discharge rate. Maybe he had his wording mixed up. you have a parasitic power draw somewhere that caused it to go dead. If its holding the charge at 13.1 over night you should be fine. Did you maybe leave a light on or something? What car etc. Quote THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
melonhead Posted October 25, 2010 Author Report Share Posted October 25, 2010 Car is an 03 Honda Civic LX. No, I did not leave any lights on overnight. Quote Link to comment Share on other sites More sharing options...
n8ball2013 Posted October 25, 2010 Report Share Posted October 25, 2010 how did your old battery die on you? I really think you have a parasitic draw but I can't say for certain. Quote THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
melonhead Posted October 25, 2010 Author Report Share Posted October 25, 2010 The old battery died because it was old, it was like 5 years old. Let me give you a lowdown of how far I drive, what I do, etc and see if this will help you any. I drive into work once a week and it's a 2 hour drive (4 hours round trip). I bump my system the whole time while driving. My system is in my sig and it's barely 1k watts total. The day the battery died, it was raining so I had my wipers running, lights on, defrost on pretty much the whole time and the system bumping. Did the same thing both there and back. Stopped to get gas 10 minutes from home on the way back when it died. Up until that day I only ran the system with the lights on and maybe defrost, but no wipers. My wife drives the car a few times during the week and she listens to the radio but doesn't bump the system full tilt. Just loud enough for her to hear the radio station. Quote Link to comment Share on other sites More sharing options...
n8ball2013 Posted October 25, 2010 Report Share Posted October 25, 2010 I wouldnt expect that to be an issue. You arent going to flat line a battery with a total current draw of 150 amps or so in a few hours. Quote THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
melonhead Posted October 25, 2010 Author Report Share Posted October 25, 2010 Could it be the alt dieing? I know when an alt starts to go out, it can take the battery with it can't it? It's the original stock 70 amp alt and I have the big 3 done but the lights still dim a little. Quote Link to comment Share on other sites More sharing options...
bassahaulic Posted October 25, 2010 Report Share Posted October 25, 2010 What is your voltage when the car is running? Quote Link to comment Share on other sites More sharing options...
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