DiBo Posted May 21, 2019 Report Share Posted May 21, 2019 I have four group 31 AGM's in the rear ( coming out for LTO) and they're all showing 96% charged but my front AGM (group 65) is resting at 12.2 and showing 55% charged. WTF? You guys think my rear Bank is slowly killing the front battery? Bosch AGM. Pep boys brand. Everything coming out for LTO anyway. Link to comment Share on other sites More sharing options...
realflow100 Posted May 21, 2019 Report Share Posted May 21, 2019 check wiring is thick enough awg to handle the current and balance the batteries good. maybe charge up the battery manually with a battery charger seperately on its own to see if it keeps a charge and then put it back and see if it starts draining again or stays the same theres something weird going on there for sure Link to comment Share on other sites More sharing options...
DiBo Posted May 21, 2019 Author Report Share Posted May 21, 2019 30 minutes ago, realflow100 said: check wiring is thick enough awg to handle the current and balance the batteries good. maybe charge up the battery manually with a battery charger seperately on its own to see if it keeps a charge and then put it back and see if it starts draining again or stays the same theres something weird going on there for sure Everything wired with 2/0ga... Silver tinned certified basshead with a singer 320 alternator. I unhooked the rear bank and I'm charging my front battery. Not like it really matters I have two hundred amp hour of lithium now so... AGM is coming out!! Link to comment Share on other sites More sharing options...
Jessica Posted May 21, 2019 Report Share Posted May 21, 2019 i dont think you are supose to mix lith wih agm. Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
SnowDrifter Posted May 21, 2019 Report Share Posted May 21, 2019 Are the recorded voltages with front/rear batts connected or disconnected from eachother ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444 Link to comment Share on other sites More sharing options...
Joshdashef Posted May 21, 2019 Report Share Posted May 21, 2019 I would disconnect your front battery from all wires, test voltage and if it persists at 12.2 then charge overnight and leave it on charge with a trickle charge or something. I use my xs power charger for mine but I’m pretty sure any will do if it’s in spec SMD Tool Map (2022): https://www.stevemeadedesigns.com/board/topic/220267-smd-tool-map-2022/ My Port Size Calculator (in progress): https://www.stevemeadedesigns.com/board/topic/217087-port-size-calculator-in-progress/ Common Port Walls for a Slot Port: https://www.stevemeadedesigns.com/board/topic/217076-common-port-walls-why-it-matters-to-your-box/?tab=comments#comment-3240313 Link to comment Share on other sites More sharing options...
realflow100 Posted May 21, 2019 Report Share Posted May 21, 2019 Not good idea to mix lithium and AGM. different operating voltages and charge methods and currents. Link to comment Share on other sites More sharing options...
BassMunky Posted May 21, 2019 Report Share Posted May 21, 2019 There you go Shakin not Stirred....my buildhttp://www.stevemead...ngle-cab-build/412 CVX And put a sealed enclosure in your trunk cut a hole in your deck and call it ported Link to comment Share on other sites More sharing options...
DiBo Posted May 21, 2019 Author Report Share Posted May 21, 2019 2 hours ago, strangeduck said: i dont think you are supose to mix lith wih agm. Doing a battery delete. 2 hours ago, SnowDrifter said: Are the recorded voltages with front/rear batts connected or disconnected from eachother Disconnected. I removed the rear bank. All 4 of my group 31's read 13v and 96% charged. 2 hours ago, Joshdashef said: I would disconnect your front battery from all wires, test voltage and if it persists at 12.2 then charge overnight and leave it on charge with a trickle charge or something. I use my xs power charger for mine but I’m pretty sure any will do if it’s in spec Took about 4 hours to charge to full. Need the front battery to be good until I get my LTO buss bars. We'll see what happens. 1 hour ago, realflow100 said: Not good idea to mix lithium and AGM. different operating voltages and charge methods and currents. I'm aware. Thank you tho. Link to comment Share on other sites More sharing options...
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