In higher quality electric bikes, most companies put batteries into the down tube or create a channel for a battery. In mopeds I imagine the batteries are large

In higher quality electric bikes, most companies put batteries into the down tube or create a channel for a battery. In mopeds I imagine the batteries are larger and they are aiming for much cheaper prices. A good electric bike will cost more than a gas moped. Cheaper electric bikes tend to be off the shelf parts and so you don't see integrated stuff. Usually batteries are in bottle cages, rear racks, or a "Shark Fin". Here is integrated: https://www.prioritybicycles.com/products/current https://www.prioritybicycles.com/products/current Here is a good, but inexpensive shark fin one: https://www.radpowerbikes.com/products/radrover-electric-fat-bike https://www.radpowerbikes.com/products/radrover-electric-fat...