The Lowest Price Lock Pass is a feature offered by Flipkart during their Big Billion Day sale. It is a guarantee that you will always get the lowest price during the sale. To secure the pass, you need to make a non-refundable deposit of Rs. 1,999. The pass grants you exclusive access to the lowest price for your chosen product during the first two days of the sale. If the price drops during the sale, you will get a refund. The pass offers numerous benefits, including price assurance, time-saving, and deal security. However, it is essential to note that the pass is non-refundable, so you should make your purchase decision wisely. To redeem the pass, you need to follow some straightforward steps. The specific fee amount for the pass is not mentioned in the search results.