When you have used the starter motor, specially high torque starter motors, to start your Harley-Davidson motorcycle it takes a ride of at least 50 Miles to recharge the battery fully. As a result, a few starts without putting some mileage on, can very easily flatten the battery. On the other hand, a constant charge from a normal charger may overcharge your battery and kill it. As the best solution we have had a fully automatic trickle battery charging system developed by AccuMate. This private label Zodiac Trickle Charger, will cure your starting problems and extend the battery life. It can be used for both 6 and 12 V, including lead acid batteries, Gel batteries and Maintenance Free batteries. This 3-stage "IUoU" Power Charging System not only charges a low battery, it also maintains a battery in top condition, automatically recharging the battery when the current drops under 200 mA. The AccuMate is extremely easy to operate having only one switch to select either 6 or 12 V. Electronic automatic fuses prevent short circuiting or wrong polarity. The AccuMate also has 5 LEDs to warn you for: •Power On •Charging •Voltage Selection •Wrong Polarity •Fully Charged Separately available is an additional eyelet connection cable set, as supplied with the charging device, making it possible to maintain the batteries of more than one vehicle. Note: Accumates supplied before December 2014 do not have a SAE style plug but a white KET style plug