Powerbank rentals and minimum holds with first transaction

We have a low threshold for the initial hold on a user’s account to rent a powerbank. This hold usually covers the first interval for a rental (typically 30 or 60 minutes). The hold works like a hold when checking into a hotel to cover incidental chargers. Our hold amount is low as our fee is low. Charging more tends to mean fewer rentals, rather than risking the occasional powerbank that may end up being purchased by a user only being charged the hold amount and then not returning the powerbank. The account will still be attempted to be charged 5 times from the inital rental to capture the payment.