Sarah Tew/CNET

Amazon Kindle customers could get more than double what was previously estimated from the recent Apple e-book lawsuit settlement, the company posted in its forum on Friday.

Pending court approval, some customers who previously purchased books from the publishers involved in the case are estimated to receive between $0.73 to $3.82 per Kindle book thanks to more publishing companies agreeing to the settlement, according to the Amazon. The US Attorneys General had previously said the refund would range from $0.30 to $1.32.

The refund is the result of a $165 million settlement from a lawsuit in which the US Department of Justice accused Apple and several of the nation's largest publishers of conspiring to fix e-book prices. Eventually, all the publishers settled, while Apple proceeded to trial.

The refund for Amazon's customers applies to Kindle books published by Hachette, HarperCollins, Simon & Schuster, Penguin, and Macmillan between April 1, 2010, and May 21, 2012. (Simon & Schuster is owned by CBS, the company that publishes CNET.)

If there's no appeal and the court approves the settlement in December, the refund will automatically appear in the accounts of eligible Amazon customers.