22112009273.jpghave recently compleated new bike build, its a 36v 750w china kit ( the big black one) i used the batteries off my old 250w ebike which i have been riding for around 12 years and was very pleased with. the problem arose when i had to climb a not very steep hill. every 10 or twenty yards it cut out for a few seconds and then came back on again. i put this down to old batteries so got myself a new set of 14amp and fitted them. the voltage shows 40.5v which i thought would be ok but it is still doing it. it is going a little farther than before but am only getting around 2-3 miles befor it starts. if i run at half trottle it seems to help but im stumped as to what it can be.
if there is someone out there who has had the same problem or who knows what it can be id be most greatfull