I need someone to either rein me in or push me over the edge on this battery. Check it out:
http://www.aliexpress.com/store/product/48V-20AH-Rear-rack-Lithium-Battery-with-BMS-Charger-48V-1000W-Electric-Bicycle-POWER-Akku-Li/1714144_32293327385.html
48w, 20ah, 25A continous and ~13lbs. Looks...