| thunder road | -- 10-01-2018 @ 5:59 AM |
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When charging your 6 volt battery in your in your car , Which has a positive ground system, I'm guessing it's best to remove the terminals and put positive from the charger, to positive on the battery and negative from the charger to negative on the battery. If you want to leave the positive and negative cables connected in your car when charging , then I assume you would connect the positive from the charger to the positive on the battery which is grounded to the car? Lastly these new gel battery's need to have a battery charger which has a setting for gel batteries. I have read that you should not charge a gel battery, with a battery charger with out the gel setting on the battery charger. Also no more than 4-6 amps on a gel battery , also I heard to never leave a battery tender on a gel battery. I personally think that these new gel battery's are inferior to the acid sealed ones. With these company's now making these original looking antique gel battery's , I would try and see if anyone makes a false outer cover to put a good old fashion sears die hard acid battery in to it. Domenic This message was edited by thunder road on 10-1-18 @ 6:05 AM
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| cliftford | -- 10-01-2018 @ 6:16 AM |
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You are correct on your battery charger hookup. I always unhook at least one cable just in case. I'm not sure on the agm batteries. Contact the Optima people for info,
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| TomO | -- 10-01-2018 @ 8:21 AM |
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If you leave the cables connected, you can also connect the positive from the charger to a good engine ground. Like Cliftford, I disconnect the grounded cable when charging the battery or when the car is going to be sitting for more than a few hours. The Optima battery is not a gel cell battery and needs to be slow charged just like any lead acid battery. If you have a smart charger you may have to put another battery in parallel with the AGM battery when it charge is less than 80% ( less than 5 volts) of its rated voltage. This is so the smart charger can recognize the battery as a good battery. When you do this, you must check the discharged battery frequently to make sure tat it does not overheat or gas. The Optima batteries that most people on this Forum use are spiral wound absorbent glass mat batteries. Here is a link to explain the difference between your Sears Die Hard, AGM and gel cell batteries. https://batteryuniversity.com/learn/article/absorbent_glass_mat_agm Tom
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