If you keep your powerbank longer than a week, you will be charged 2 € per additional week (max. 15 €).
How does this service work?
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Rent a powerbank for one week for 3 €. To receive your powerbank,
you will be given a QR code that you need to show to the merchant.
After the merchant scans the QR code and you receive the powerbank, we
will charge you the rental fee.
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If you keep the powerbank longer than one week, you'll be charged an
extra 2 € for every additional week until you return the
powerbank or until a maximum of 15 € in extra charges is reached
(the last additional charge in week 8 is 3 €).