| 摘要 |
The bag (1) has a luggage container (3), and a roller (5) for friction-free motion of the luggage container over the ground. The roller is coupled with a power generator (9) to generate electricity based on rotation of the roller. The power generator is provided with a connection for connecting a small electrical device, and comprises a battery charging case. The power generator is protected against moisture. The roller and/or the generator are formed such that torque is not exerted on the bag by the roller during motion of the container over the ground.
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