I have an older Scoot-e scooter. 24v scooter. I wad having issues with motor so i decided to buy a new 500w motor off of ebay as well as a controller. Also purchased a new throttle. Now for the question...the battery is a 7s4p 24v battery from china. It measures 27.5 volts, so it is charged. However when i connect directly to motor, nothing happens. Is my battery not big enough for motor?