EVFERN.CA... FEdERALY APPROVED TO SHIP ANYWHERE IN THE WORLD......they are located in whitby Ontario...cells are a123 10ah pouch.... I have been using a 36v,20ah pack for about a month,,,EXCELLENT....less than 2volt sag with a 30amp draw going uphill.... they supply batteries to the military and other commercial accounst... they will make a battery to any specs for anybody including private individuals...... they also carry a very wide range of electronic equipment...expensive? yes, BUT, made in Canada and guaranteed for one year...look them up and see for yourself