I opted to get the more powerful battery because I thought the additional power would allow me to commute to work and back on a daily basis. It has helped me in that function because, my work is 18-20 miles away depending on the route I take and I don't want to carry the charger. The thing I didn't anticipate was how useful it is to have an extra battery charged and ready to go on the weekend. I can go to the gym and run a few errands in the morning, come home clean up, grab the other battery and head to my friends house. I sold my car a few months back and was riding my track bike everywhere; I felt like I was getting to be known as, the sweaty guy. Now I can go places and look cool while remaining green! Go Earth!!
These batteries are amazing and last a long time off of a single charge. Highly recommend.