You cannot typically redeem a gift card directly through the Kindle Paperwhite interface. Follow these steps on a computer or phone:
using a gift card, you must first using a web browser or the Amazon mobile app . Once the balance is applied, Amazon automatically uses it as the primary payment method for all Kindle "1-Click" purchases before charging your credit card. 1. Redeem Your Gift Card
To buy books on your Kindle Paperwhite Go to product viewer dialog for this item.
: Go to the Amazon Redeem a Gift Card page, enter your claim code, and click Apply to Your Balance .
: Tap the Account icon, select Manage gift card balance , then choose Redeem another gift card to scan or enter your code. 2. Purchase Your Book