Specifications: Input voltage: AC100-240V 50 / 60HZ Output voltage: DC 16.8V Output current: max. 1A Output interface: 5.5 * 2.1mm DC interface Interface polarity: internal + (+) external negative (-) Size: 75m*50mm*33mm(L*W*H) Features: -100% Brand new and high quality -Automatic charging without over charging. -Short circuit protection. -Over current protection. -Battery Polarity Reversal. -Red Led on when charging, green led on when fully charged. -Applicable to 2 strings or 2 strings of parallel lithium battery charge -Fit for 14.4V 14.8V Li-ion Li-Po Battery Package Included: 1 x Battery Rechargeable charger.