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A bicycle including a frame that has a head tube, and a frame member that is elongated along a longitudinal axis. The bicycle also includes a receiver that is disposed in the frame member, and a battery pack that is coupled to the frame member and detachably connected to the receiver. The receiver h

A bicycle including a frame that has a head tube, and a frame member that is elongated along a longitudinal axis. The bicycle also includes a receiver that is disposed in the frame member, and a battery pack that is coupled to the frame member and detachably connected to the receiver. The receiver has a tapered socket and a power connector encircled by the tapered socket. The battery pack has a tapered end cap that is insertable into the tapered socket along the longitudinal axis. The tapered end cap includes a battery connector disposed on an end of the battery pack. The tapered end cap is at least partially nested within the tapered socket along the longitudinal axis upon connection between the receiver and the battery pack, and the battery connector is electrically connected to the power connector upon nesting the tapered end cap in the tapered socket.

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1. A bicycle comprising: a frame including a head tube, and a frame member elongated along a longitudinal axis;a fork rotationally coupled to the head tube;a wheel rotationally coupled to the fork;a handlebar coupled to the fork for steering the wheel;a receiver disposed in the frame member, the rec

1. A bicycle comprising: a frame including a head tube, and a frame member elongated along a longitudinal axis;a fork rotationally coupled to the head tube;a wheel rotationally coupled to the fork;a handlebar coupled to the fork for steering the wheel;a receiver disposed in the frame member, the receiver including a tapered socket and a power connector encircled by the tapered socket; anda battery pack coupled to the frame member and detachably connected to the receiver, the battery pack including a tapered end cap insertable into the tapered socket along the longitudinal axis, the tapered end cap having a battery connector disposed on an end of the battery pack,wherein the tapered end cap is at least partially nested within the tapered socket along the longitudinal axis upon connection between the receiver and the battery pack,wherein the battery connector is electrically connected to the power connector upon nesting the tapered end cap in the tapered socket,wherein the power connector is defined by a projection or a recess and the battery connector is defined by the other of a projection or a recess, and wherein the electrical connection is made when the projection is nested within the recess, andwherein the battery is inserted through a top opening of the frame member. 2. The bicycle of claim 1, wherein the receiver has an outer profile conforming to an inner profile of the frame member. 3. The bicycle of claim 2, wherein the frame member includes a down tube. 4. The bicycle of claim 1, wherein the battery pack includes a shoulder disposed adjacent the tapered end cap, and wherein the shoulder abuts the receiver upon attachment of the battery pack to the receiver. 5. The bicycle of claim 4, wherein the tapered end cap has a continuously tapered surface between the shoulder and an end of the battery pack. 6. The bicycle of claim 5, wherein the continuously tapered surface is defined by a conical taper and a spherical taper. 7. The bicycle of claim 4, wherein the battery pack includes a user interface disposed adjacent the shoulder. 8. Battery pack apparatus for a bicycle, the battery pack apparatus comprising: a bicycle frame including a frame member;a receiver disposed in the frame member, the receiver including a tapered socket and a power connector encircled by the tapered socket; anda battery pack detachably connected to the receiver, the battery pack including a housing elongated along an axis and configured to support a battery, the battery pack further including a powered end cap disposed on an end of the housing to receive power from the battery, the end cap having a battery connector and a taper conforming to a surface of the tapered socket and insertable into the tapered socket,wherein the end cap is at least partially nested within the tapered socket along the axis upon connection between the receiver and the end cap, andwherein the power connector is electrically connected to the end cap upon nesting the end cap in the tapered socket, andwherein the power connector is defined by a projection or a recess and the battery connector is defined by the other of a projection or a recess, and wherein the electrical connection is made when the projection is nested within the recess, andwherein the battery is inserted through a top opening of the frame member. 9. The battery pack apparatus of claim 8, wherein the receiver has an outer profile conforming to an inner profile of the frame member. 10. The battery pack apparatus of claim 9, wherein the frame member includes a down tube. 11. The battery pack apparatus of claim 8, wherein the battery pack includes a shoulder disposed adjacent the tapered end cap, and wherein the shoulder abuts the receiver upon attachment of the battery pack to the receiver. 12. The battery pack apparatus of claim 11, wherein the tapered end cap has a continuously tapered surface between the shoulder and an end of the end cap. 13. The battery pack apparatus of claim 12, wherein the continuously tapered surface is defined by a conical taper and a spherical taper. 14. The battery pack apparatus of claim 11, wherein the battery pack includes a user interface disposed adjacent the shoulder. 15. The battery pack apparatus of claim 8, wherein the powered end cap supports a power switch. 16. The battery pack apparatus of claim 8, wherein the housing has a bottle cage support.