well i have a lithium battery charger of 36v for another scooter
Model szYB-100w-42V2A
input 100-200VAC ~50/60Hz
output 42VDC 2A
am i able to connect this to mains ten the other end to the step up module to get it to 48v or it wouldnt work and also this charger is lithium battery charger so can i use on lead-acid