It is fused at 10 amps and is equipped with a cigarette lighter socket. This battery does not have a memory so intermittent charging will not affect it. Actually, we recommend it. This battery can easily handle the power requirements for driving a telescope and for powering our heating system. It will ruin the battery.
Automotive chargers charge at a higher voltage than other battery chargers.
If the charger charges at 14.8 volts or higher, the electrolyte will begin to turn to gas. In a normal car battery this is not a problem as the battery can be topped up. Shown below is a chart indicating how long the battery will last to a state of charge of 10.5 volts. The numbers below the hours represent the amount of amps being drawn per hour. The hour numbers indicate how long the battery will last to a charge of 10.5 volts when drawing the amount of indicated amperage.