I purchased the E8 Searcher and it has a 24v, 10ah stock battery with the 250w front hub motor. What can I do to make it a better E-Bike? By this I mean the motor barely has enough power to climb hills in this area and the Battery only lasts for approx 3.5 miles of the hills. I assume everything would have to be replaced but keep in mind I would like to be able to go 20 miles minimum at approx 25 MPH, and still have some power in reserve. I am a 230lb 6'1 rider. I believe the Schwinn frame weights in around 40 Lbs. Thanks for any help/suggestions