What does it mean to drain your battery?
Discharging, or draining, describes the process of your battery loosing voltage, or energy. It is important to understand that a battery is always discharging anytime it is not being directly charged.
Discharging your battery can be both an active or an inactive process. When you are using your battery to power electronics in a boat or motorhome application, this becomes an active process. Equally important, you are inactively discharging your battery whenever it is left unused for any period of time, even without a load connected.
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