![]() If it has, turn off the battery charger, and disconnect the battery charger from the "good battery" Remove the good battery and the jumper cables from the Optima battery. This generally takes less than two hours with a 10-amp charger. With your voltage meter, check back often to see if the Optima battery has been recharged to 10.5 volts or above. Also stop the process if you hear the Optima battery "gassing (making a hissing sound coming from the safety valves). ![]() Stop charging the Optima battery immediately if the battery is very hot to the touch. Batteries naturally become warm during charging, but excessive heat may be an indication that there really is something wrong with the battery. The charger will "see" the voltage of the good battery (hooked up in parallel), and start providing a charge.Īfter the batteries have been recharging for about an hour, check to see if the Optima battery is slightly warm, which is good. Now, connect the good battery to the charger. Do not have the battery charger connected to either battery while making these connections. Using jumper cables connect the good battery and deeply discharged Optima battery in parallel – positive to positive and negative to negative. The seemingly dead, deeply discharged Optima battery (It can be an AGM or flooded battery- it doesn't matter.) here is how you do it.Ī good battery, preferably one with a charge of 12.0 volts or above. ![]() ![]() You can trick your traditional lead acid battery charger into charging the deeply discharged Optima battery. Ideally you would want to connect your discharged Optima battery to an AGM rated battery charger.īut.What If You Do Not Have an AGM Battery Charger But the Optima battery may be just fine it has simply slipped below the minimum voltage threshold of the battery charger turn on, and because of the low internal resistance of the Optima battery, the battery charger simply doesn't know what to do, so it does nothing. If they don’t come on, it is often because the battery charger thinks the battery is “bad.” Continuing to charge a “bad” battery is dangerous we all agree. Most analog battery chargers are binary, which means they are either "on or off". Because an Optima battery has low internal resistance it too is often seen as defective. A traditional lead acid battery that's at 10.5 volts or less is seen by the battery charger as being defective, having either a short, a bad cell or some other defect. Most battery chargers built in the last twenty years, have a built-in safety feature that prevents the battery charger from recharging a deeply discharged battery. That translates to the very high cranking power that we enjoy. The great thing about AGM batteries, like the OPTIMA, is that they have very low internal resistance. However.odds are it is not! You just need to understand a key difference between an Optima battery and a conventional lead acid battery. If you connect a conventional lead acid battery charger to an Optima battery with less than 10.0 volts in the battery, the battery charger will often just "click and turn off! Your first thought is the battery must be defective. what happens when you deeply discharge an Optima Battery. ![]() The 6-volt Optima Batteries like their 12-volt counterpart are a thousand cranking amps. There is four feet of battery plates in each one of those cells. They were originally designed by Gates of belt and hose fame. I have been selling Optima Batteries since their introduction. In the installation process it would be easy to tip a battery enough during installation to spill a little acid which would almost immediately remove some paint. To us that own and drive antique vehicles that is very important because the battery locations in many of our vehicles are under the floor or on the firewall, which involves lifting a battery over the fender or a running board. Optima batteries are well know for their reliability and the fact that they are a sealed battery which means no risk of an acid spill. ![]()
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