BassMunky Posted March 5, 2019 Report Share Posted March 5, 2019 When be a good time to replace a battery? Had both for 2 yrs now front rest at 12.6 back rest at 12.3? Both Duracell agm group 31 from sams. 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...
Dragonsyph Posted March 6, 2019 Report Share Posted March 6, 2019 Most battery’s are rated to be dead at 12v and have testing of around 12.9 so at 12.3 that’s almost dead lol, if those resting voltage are after charging them I’d say both battery’s are bad or going bad. Not sure if dif brands have dif resting voltages so it could be different. ♦ Sundown NSV4 18" + Sundown SALT-4 Baby ♦ MechMan Elite 370a + XS3100 - XP3000 ♦ SHCA 1/0 OFC(blue) + SMD Fuse Holders(blue) ♦ Pioneer AVH-2440NEX + SHCA Pro RCA Link to comment Share on other sites More sharing options...
Joshdashef Posted March 6, 2019 Report Share Posted March 6, 2019 XS recommends 12v batteries stay above 12.6 so 12.3 is in bad water depending on the brand 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...
BassMunky Posted March 6, 2019 Author Report Share Posted March 6, 2019 I should replace both batteries? 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...
reedal Posted March 6, 2019 Report Share Posted March 6, 2019 Have you tried reconditioning them first? SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32 Link to comment Share on other sites More sharing options...
BassMunky Posted March 6, 2019 Author Report Share Posted March 6, 2019 Like I said the charger I have I dont know how how to get to that setting. Schumacher 1200 charger. 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...
BassMunky Posted March 6, 2019 Author Report Share Posted March 6, 2019 How you recondition? Desulphate? 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...
reedal Posted March 6, 2019 Report Share Posted March 6, 2019 Select battery type (agm) place in charge mode, when charge is complete it will automatically go into maintain mode (pulsing green LED). *If the charger has to provide its maximum maintain current for a continuous 12 hour period, it will go into abort mode (see Aborted Charge section)* Leave it in maintain for a day, then remove charger for a day, then check battery resting voltage with a multimeter SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32 Link to comment Share on other sites More sharing options...
BassMunky Posted March 6, 2019 Author Report Share Posted March 6, 2019 Let charge and float for a day. Then disconnect rest for a day Check voltage after? Just confirming 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...
BassMunky Posted March 6, 2019 Author Report Share Posted March 6, 2019 11 hours ago, reedal said: Select battery type (agm) place in charge mode, when charge is complete it will automatically go into maintain mode (pulsing green LED). *If the charger has to provide its maximum maintain current for a continuous 12 hour period, it will go into abort mode (see Aborted Charge section)* Leave it in maintain for a day, then remove charger for a day, then check battery resting voltage with a multimeter Also the schumacher cant go to desulphate directly. Should I get a ctek charger? Those can directly choose desulphate. 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...
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