dangaranga Posted August 27, 2014 Report Share Posted August 27, 2014 So I have a duralast gold starting battery and a group 31 Juicebox agm in the back. Since I am at school there is periods that i wont drive my truck. My question is at what voltage should i go out and drive the truck to charge back up. I just checked it after almost 3 days and its resting at 12.77v. What is everybody comfortable with for voltage? Thanks for the help. Brandon 2000 Furd Ranger supercab 4x4 System: welding wire throughout the truck USalts 390amp Hairpin Juicebox in stock location 8 Banks of maxwell supercaps 2 American Bass Vfl 1100.1 wired to .35 each 2 Fi Audio Sp4 18's ( the DD sc 9918's smoked) Pioneer radio with Soundstream PA mids Powered by a nice sized soundstream 2 channel It's pronounced (dain-ja rain-ja) 2001 2 door focus 1 DD9918 SC Link to comment Share on other sites More sharing options...
B2 Hertz Posted August 27, 2014 Report Share Posted August 27, 2014 That is a perfectly fine resting voltage. You really can't manipulate the resting voltage. Link to comment Share on other sites More sharing options...
dangaranga Posted August 27, 2014 Author Report Share Posted August 27, 2014 I only ask because when i was driving my truck daily for work, i could come out in the morning and be resting at 13.1v, so my current voltage compared to that is what concerns me Brandon 2000 Furd Ranger supercab 4x4 System: welding wire throughout the truck USalts 390amp Hairpin Juicebox in stock location 8 Banks of maxwell supercaps 2 American Bass Vfl 1100.1 wired to .35 each 2 Fi Audio Sp4 18's ( the DD sc 9918's smoked) Pioneer radio with Soundstream PA mids Powered by a nice sized soundstream 2 channel It's pronounced (dain-ja rain-ja) 2001 2 door focus 1 DD9918 SC Link to comment Share on other sites More sharing options...
RooTxBeeR Posted August 27, 2014 Report Share Posted August 27, 2014 Do you have both batteries in parallel together without any type of battery isolator? Different batteries rest and different voltages, so if they are in parallel they will rest at the lower of the two voltages. On 11/20/2012 at 8:54 PM, AMI CUSTOMS said: Turned mine up today at a light, guy next to me his steering wheel started moving and he looked over at me like I was a magician lol. On 5/9/2012 at 8:45 PM, skittlesRgood said: fuck the plating. look at what the main metal used is. you could buy unicorn blood plated terminals but if its just covering up dog shit, whats the point On 4/10/2013 at 12:26 PM, mrd6 said: I'll admit, half way through sanding that fiberglass in the rain and cold while I was all itchy I was definitely starting to question why i was doing this haha Soon To Be '04 Ford Escape US Alternator 280A Hairpin D4800 Under the Hood (6) XP3000's in Rear 1/0 SHCA & XS Power 4 runs to back TORK2 kit from Tony @ CE Auto Supply Pioneer DEH-80PRS DD AW6.5 (2) per door *Tweeter Unkown* DD SS4a & C3d (2) SCV4000 @ .5Ohm (2) 15" Sundown Zv5 Link to comment Share on other sites More sharing options...
dangaranga Posted August 27, 2014 Author Report Share Posted August 27, 2014 Yea thats why I'm here lol lead acid and an agm together. I know the acid will pull the agm down over time, but I am wondering at what point do i run the truck to charge the agm back up? I will eventually upgrade the front to agm but thats not for atleast a few months. Brandon 2000 Furd Ranger supercab 4x4 System: welding wire throughout the truck USalts 390amp Hairpin Juicebox in stock location 8 Banks of maxwell supercaps 2 American Bass Vfl 1100.1 wired to .35 each 2 Fi Audio Sp4 18's ( the DD sc 9918's smoked) Pioneer radio with Soundstream PA mids Powered by a nice sized soundstream 2 channel It's pronounced (dain-ja rain-ja) 2001 2 door focus 1 DD9918 SC Link to comment Share on other sites More sharing options...
Tarball Posted August 27, 2014 Report Share Posted August 27, 2014 disconnect your fuse during periods of non-use CURRENT SYSTEM: Alternator: Stock alt on mids/highs Isolated DC Power 270 SP - Charging @ 16.8v Batteries: (2) XS D1400s Power Cable: Double Runs of 1/0 KNU Kolossus Fleks Headunit: 80-PRS Sub Amp: DC 5.0k Subwoofers: 2 RE MT 15s /PSI dual .7ohm recones Subwoofer Enclosure: 9.1cubes @ 32hz - brutal. Mids & Highs Amp: CT125.4 Active Components: Mids RE XXX 6.5c Highs - 3 RE XXX tweeters per side(A pillar) Noise Control: Damplifier Pro all over the cab. Build Log If you do business with me please leave feedback here: FEEDBACK THREAD Highest Legal Score: 151.0 db Highest Musical 30 Second Average: 151.6 db Link to comment Share on other sites More sharing options...
deadbroke Posted September 9, 2014 Report Share Posted September 9, 2014 So you can wire multiple batteries with different resting voltages I thought I read somewhere if the resting voltages weren't equal they would just keep draining each other apparently they rest at the lower voltage? I would at least get 2 Agm batteries never really knew why mixing is bad but I'll stick with the idea Link to comment Share on other sites More sharing options...
dangaranga Posted September 9, 2014 Author Report Share Posted September 9, 2014 You are not supposed to. I should have worded my question better, basically i was wondering at what point do i run the truck to charge the agm back up to its rest voltage since i dont have access to a charger at the dorms. They seem to settle at 12.7 and dont really drop any lower than that so it should be ok. Besides, I will just drive the truck every few days or so. Once winter comes, i will just pull the fuses. Brandon 2000 Furd Ranger supercab 4x4 System: welding wire throughout the truck USalts 390amp Hairpin Juicebox in stock location 8 Banks of maxwell supercaps 2 American Bass Vfl 1100.1 wired to .35 each 2 Fi Audio Sp4 18's ( the DD sc 9918's smoked) Pioneer radio with Soundstream PA mids Powered by a nice sized soundstream 2 channel It's pronounced (dain-ja rain-ja) 2001 2 door focus 1 DD9918 SC Link to comment Share on other sites More sharing options...
JEFFYBOI Posted September 9, 2014 Report Share Posted September 9, 2014 I have had my AGMs which are connected to my wet cell under the hood sitting for up to about 3-4 weeks no problem. Your resting voltage sounds pretty normal, for your situation. I always like to take all my batteries out every few months and get them fully charged up. Mixing batteries is not (recommended) you just wont get the performance out of them if they were all AGMs. You can get a battery isolator to prevent the your duralast from dragging down your AGM but i would just save for another AGM up front under the hood. Thats my plan! "Toyota Camry rebuild page 21 (link)http://www.stevemeadedesigns.com/board/topic/183768-94-crossfire-camry-18s-walled-singer-alt-has-arrived-rebuild-starts-pg-10/page-21 PIONEER DEH-P8400BH 2 CROSSFIRE C5 1700D 2 CROSSFIRE C7 18 HOOD. NSB GROUP48 TRUNK SMS AGM400 DUAL RUNS X SCORP 1/0 OFC 275A SINGER ALT. DYNAMAT XTREME SOUNDSTREAM TA4.280 PIONEER COMPONENTS Link to comment Share on other sites More sharing options...
dangaranga Posted September 9, 2014 Author Report Share Posted September 9, 2014 Yea, an xs D3400 will fit perfect under the hood. eventually i will get one. But with college started back up I can't really throw more money at it for a while, atleast not until December. Brandon 2000 Furd Ranger supercab 4x4 System: welding wire throughout the truck USalts 390amp Hairpin Juicebox in stock location 8 Banks of maxwell supercaps 2 American Bass Vfl 1100.1 wired to .35 each 2 Fi Audio Sp4 18's ( the DD sc 9918's smoked) Pioneer radio with Soundstream PA mids Powered by a nice sized soundstream 2 channel It's pronounced (dain-ja rain-ja) 2001 2 door focus 1 DD9918 SC Link to comment Share on other sites More sharing options...
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