Apple has just announced it will be offering a $50 reimbursement for customers who paid full price for an out-of-warranty battery replacement last year.

This comes in the wake of the #iPhoneSlow debacle that flared up at the start of the year, in which Apple admitted that some older iPhones throttled performance to avoid the random shutdowns that can come with aging batteries. The best fix, it explained, was to replace the battery entirely – and to make that a more palatable option it knocked $50 off the price of a battery replacement, from $79 down to a bargain $29.

However, this left a sour taste in the mouth of anyone who paid full price for a new battery before the discount came into effect. Which is why Apple is now making things right with a rebate for those customers.

To qualify for the reimbursement, you need to have paid full price for an out-of-warranty battery replacement on an iPhone 6 or newer, between January 1, 2017, and December 28, 2017. Apple has started sending emails to eligible customers over the next two months, but if you haven’t heard anything yet make sure to get in touch with Apple before the end of 2018.

This credit program seems to be in effect worldwide, with the exact amount differing slightly depending on exchange rates and other factors. Currently, UK customers can expect £54 back, slightly more than the current discount.