Most electric bikes have some combination of manual pedaling, pedal assist (pedelec), and electric only (throttle) modes. Make sure you get the right one. If you have bad knees or just don't want to pedal, then make sure your electric bike can propel itself forward with just the throttle. Every Murf comes with pedal assist and a throttle so you can decide if you'd like to pedal or use full electric mode. 

Make sure your battery comes from a reputable manufacturer. Brand name batteries tend to have much longer lives (charge cycles) due to more stringent testing. Every Murf battery is built using genuine Samsung cells. 

A 36 volt battery is fine for flat areas and lighter riders but a 48 volt battery will provide enough power to help climb hills and push heavier riders more easily. The next point to consider is the batteries capacity; this is typically measured in amp hours and most electric bike batteries range from 10-20 amp hours. A higher capacity battery will give you more range. Every Murf comes with a 48 volt 15.6 amp hour battery. 

Electric bikes are built in a similar fashion to their non-electric counterparts. As such, their weight limits are roughly the same as well. Most e-bikes can support someone who is 300 lbs. Just because they can though, doesn't mean they should. Manufacturers typically post max weight limits 50 lbs. lower than their actual max to ensure reliability. A heavier rider would wear down the e-bike much faster and could potentially damage the spokes on the wheels.

Sometimes, the numbers don't match up with real world performance. Check to see if there are any reviews, videos, or other evidence that support the claims made. If the electric bikes you're looking for are available at a location nearby, go and test it out.

Always make sure the volts and amp-hour are listed and never buy an electric bike that does not have these numbers listed. They give you a general idea of what the real-world range can be. Remember to focus on the main differentiators: looks, power, range, price, motor type (pedal, pedal assist, full electric), max supported weight, battery brand, and real world results. Good luck with your e-bike hunt!