This DC12v quick glow start charger offers a quick charge time of 20 minutes for glow starters, providing it with enough energy to start the engine. Simply connect the charger to a 12v power source, the attach a glow starter onto the charger. Then, press the START button. After charging will automatically switch to a trickle charge rate of 50mA for as long as it is connected, allowing you to safely charge the battery to full capacity.