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OPTIMA Battery Charging | Storage |Maintenance

That's OK, but you should fully disconnect it to prevent parasitic drains.First, check the voltage to ensure the battery has a full charge (about 12.6 to 12.8 volts for REDTOP® models and the 34M BLUETOP® and about 13.0 to13.2 volts for all other BLUETOP and YELLOWTOP® models and about 14.0 volts for ORANGETOP® models)., OPTIMA® Battery Storage REDTOP, YELLOWTOP & BLUETOP STORAGE Because of the high-purity lead grid in the OPTIMA REDTOP, YELLOWTOP and BLUETOP battery, it has a self-discharge rate much lower than conventional flat-plate batteries., Storage Recommendations for OPTIMA® Batteries and Chargers REDTOP, YELLOWTOP & BLUETOP Storage Recommendations The most important consideration when storing any battery is to make sure the voltage never drops below 12.4 volts for lead-acid batteries, including flooded and AGM batteries, like the OPTIMA YELLOWTOP, REDTOP or BLUETOP.