Have been powering my bl 36 wilderness energy motor on 24 in wheel for years. Single speed so just run throttle. I buy 3 12v 7.5 ah SLA battries every 2 years. When new can run 5 to 7 miles. But run down within few months to 2 to3 miles. Hilly country here. Can i replace these with similar lithium 12 v like dakota brand or have pack built with the 18650 battery s. Need more range. !!