Apple is reportedly considering offering rebates to customers who purchased replacement lithium-ion batteries for their iPhone before the discounted pricing came into effect.

In the wake of a controversy about its practice of slowing down older handsets, Apple announced in December that it’s cutting the price of out-of-warranty battery replacements from $79 down to just $29 a pop. The discounted pricing is valid until December 31, 2018.

Recode reported Tuesday that Apple has responded to an open letter by Republican lawmaker Senator John Thune who has been investigating the throttling issue.

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Thune sought answers from Apple, asking in his letter this January if the Cupertino firm has considered whether or not those who paid the non-discounted price for a replacement battery should be allowed to seek a rebate for some of the purchase price.

Cynthia Hogan, Apple’s Vice President in charge of public policy in the Americas, responded to Thune today by saying, “Yes, we are exploring this and will update you accordingly.”

Have you yet taken advantage of Apple’s discounted battery pricing?