Brand new and high quality. Built in safety recharging system which won't damage your bike's battery. LED indicator light shows when charger is working. 150W-48V/20AH Charger Applicabel batteries: 48V 20Ah. Input voltage: 100V-240V, 50Hz. DCOUTPUT: 59V, 2.5A. Output current: 2.5-3A. Size: 17cm x 7.9cm x 4.6cm. Cord size: 4 feet Note: please make sure the polarity connects correct.