The VELOKS MK3 trike support battery capacities from 1 kWh to 4 kWh, and such batteries have a relatively high weight from 6 kg to 17 kg. By placing this weight at the center under the seat, it will improve the stability of the trike (lower center of gravity). It also “hides” the large battery from sight and makes the trikes look better. Thirdly, the battery has 4 mounting points, and can be easily removed by opening the two snap clips and sliding out the battery. This is handy if you need to charge the battery inside due to lack of external power, or to ensure that the battery starts with maximum capacity when it is very cold outside.