My client owns a product-service company that makes (charged) rechargeable batteries available to their clients on a subscription model, whereby my client maintains ownership of the batteries. According to MR Credit: Purchasing in the Existing Buildings category, Option 1: Ongoing Consumables, at least 50% of ongoing consumables must respect at least one of the seven criteria given. In terms of batteries, three of these could potentially be applicable: extended use (batteries are rechargeable), materials reuse (batteries are recharged and arguably reused many more times than is typical), extended producer responsibility (my client takes back all batteries and sends them directly to a battery recycler). Even if just the first criteria (extended use) would be applicable, could my client's clients apply their use of rechargeable batteries to the 50% ongoing consumables minimum in order to be admissable for 1 point? Would the purchase of such a product-service be equivalent to a direct purchase that respects the criteria, if the user does not actually own the batteries?