![]() It's ok if an OPTIMA battery gets warm while charging, but if it begins to vent or gets hot-to-the-touch, discontinue charging immediately. If your battery charger is not fully-automatic, you'll want to keep an eye on the battery as it charges, to make sure it is not overcharged. While many modern chargers are fully-automatic and will only deliver the current your OPTIMA battery needs, that is not always the case. Chances are, you'll need to add some time to your estimate for most chargers, to make sure the battery is fully-charged. That does at least give you a rough estimate of the amount of time it will take you to charge your battery though. ![]() However, that assumes the charger is 100% efficient (most are not) and would deliver a constant amount of amperage to the battery throughout the charge cycle (most do not). In the above example, if we were to use a 10-amp charge rate (and we don't recommend exceeding 10 amps when charging OPTIMA Batteries), some simple math would suggest it would take almost three hours to fully-charge the OPTIMA battery. That means, if that battery measures about 12.3 volts, you will probably need to get about 27Ah of energy back into the battery.įrom there, you should look at the rate at which your battery charger delivers current to the battery it is charging. For example, the D34/78 YELLOWTOP battery pictured above is a 55Ah battery. Once you know your OPTIMA battery's voltage level, you should find out the capacity of the battery when it is fully-charged, which is measured in amp hours (Ah). ![]() We mention that, so you can have a reasonable understanding of the relationship between the voltage level in a battery and the battery's state of charge, as we don't want someone thinking a 12-volt battery that measures 6 volts is only 50% discharged. When a REDTOP measures about 11.2 volts or a YELLOWTOP measures about 11.3 volts, it is considered 100% discharged. ![]() If a REDTOP measures about 12.1 volts or a YELLOWTOP measures about 12.3 volts, it is about 50% discharged. Knowing your battery's voltage will give you a good idea of how long you will need to charge your OPTIMA battery. If you don't have an OPTIMA charger and aren't planning on getting one anytime soon, we'll give you some general guidelines for how long you may need to charge your OPTIMA battery.įully-charged, OPTIMA REDTOP batteries (and the 34M BLUETOP) will measure about 12.6-12.8 and YELLOWTOPs will measure about 13.0-13.2 volts (and BLUETOPs, except the 34M). OPTIMA Chargers & Maintainers are fully-automatic and can eliminate the need to do any math, by charging your OPTIMA battery (or any 12-volt lead-acid battery) for only as long as they need to be charged. The company added the unit ensures a simple set-up process with pre-charge battery status display mode.A little bit of math may need to be involved, when trying to answer the question of how long you should charge an OPTIMA battery. Dual-purpose hook and tilt design allows for in-vehicle hanging or angled stand viewing. The product is both compact and portable and will come with a wall bracket and useful hook for easy and flexible use, the maker said. The product has a charge rate of up to four amps on large batteries and three amps on small batteries and can be utilized to keep all 12V AGM and flooded batteries healthy during storage.īeyond improving the performance and life of Optima and other AGM batteries, the Digital 400 is user-friendly with an at-a-glance battery indicator and check battery icons. The Digital 400, which can recover discharged batteries that others cannot, is compatible for use in automotive, truck, marine, motorcycle, powersport, lawn and garden, and RV applications. The unit will retail for $99 and be available in early 2013. Unlike the Digital 1200 12V Performance Battery Charger, released earlier this year, the new Digital 400 is more compact and can easily be used to charge and maintain a variety of vehicle segments, according to the company.
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