The ADO A16+ has a 250W brushless geared hub motor, Cross the hill,mud road,forest, and provides perfect support while riding. with a maximum electric speed of 25km/h. It has a 7.5Ah 36V battery that is fully charged in 3-4 hours . The battery is removable,hidden and placed in the frame https://www.electricsbikeusa.com/product/ado-a16-36v-7-5ah-250w-folding-electric-bike/