inputs.text: inconsistant product beware - vender baiklov 1 star review unit went dead first usehowever know charger cable supposed take 12v24v input change 55v output charge existing 55 liion battery installed unitthe unit worked duration initial battery charge initial battery charge exhausted unit ceased work why1 charging cord 12v cigarette lighter input small dc output unit defectivenote red light charger indicates getting power2 circuitry inside unit itselfsuspect diode one way electronic check valveis defectiveeither way unit not take charge cease function initial battery charge exhaustedfrom reading reviews significant percentage problems unitsince product mails china report problem return not automatically granted wait 48 hrs permission baiklovthe bottom line company best marketing inconsistent product worst recycling known defective products