As a guide, my ebike had a 19ah battery and I could go 37 miles down to a 10% charge using throttle only. So that's a 19 mile range before needing to head back. That was on a $2200 ebike. That was not enough range for me, needed another extra batt to be happy. At the time an extra 19ah batt that could only be bought from the mfr was $1300. Way too much just for a batt so I sold it. Batts have come down in price to half that now. Check out Rad ebikes, price is right, W has one and endorses them. IR has a an Ebike he likes a lot, can't remember the name. 90% of all ebikes and parts are made in china even if they claim to be an American co. That's my experience. You can gamble on a $700 ebike with some nice specs and features. Unknown named Chinese co, but will they be around to warranty it or if you need proprietary parts in a year or two? Batteries and controllers are not universal and ARE proprietary to that manufacturer.