A trickle charger generally consumes a very small amount of power. The exact consumption can vary depending on the brand and model of the trickle charger, but it's usually in the range of a few milliamperes (mA). Trickle chargers are designed to slowly charge the battery and maintain the charge level without overcharging the battery. They deliver only the required amount of power to compensate for the battery's self-discharge loss. As a result, the power consumption of a trickle charger is very low. The low power consumption of a trickle charger allows it to remain connected for extended periods, for instance, during vehicle winter storage, to ensure the battery is always ready for use.