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Charge controller
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<p>A charge controller, charge regulator or battery regulator limits the rate at which <a href="/facts/Electric_current/Dc1xdnUX">electric current</a> is added to or drawn from electric <a href="/facts/Battery_(electricity)/bqEpm4ue">batteries</a> to protect against <a href="/facts/Electrical_overload/Sx9FXrUI">electrical overload</a>, <a href="/facts/Overcharging_(battery)/bqEpm4ue">overcharging</a>, and may protect against <a href="/facts/Overvoltage/LsVwLvVQ">overvoltage</a>. This prevents conditions that reduce battery performance or lifespan and may pose a safety risk. It may also prevent completely draining ("deep discharging") a battery, or perform controlled discharges, depending on the battery technology, to protect battery life. The terms "charge controller" or "charge regulator" may refer to either a stand-alone device, or to control circuitry integrated within a battery pack, battery-powered device, and/or <a href="/facts/Battery_charger/JfygTRaJ">battery charger</a>. </p>