A product warranty has a legal requirement in the US that states something to the effect that a warranty claim can not exceed a relative portion of the value of the product. A small battery, a USB cable, even a mouse, a company would rather just send a replacement than have it sent back, on their dime or the customers.
I had a coffee maker die, I got it as a refurb, was $90 at Walmart, cost me $25, the manufacturer warranty was 90 days, and I fell within it, showed them a picture of teh power cord cut off and they sent me another, because it cost them $3 to make it, cheaper to ship another and still come out ahead then pay to ship it back.